Abstract

We realize quantum gates for path qubits with a high-speed, polarization-independent and tunable beam splitter. Two electro-optical modulators act in a Mach-Zehnder interferometer as high-speed phase shifters and rapidly tune its splitting ratio. We test its performance with heralded single photons, observing a polarization-independent interference contrast above 95%. The switching time is about 5.6 ns, and a maximal repetition rate is 2.5 MHz. We demonstrate tunable feed-forward operations of a single-qubit gate of path-encoded qubits and a two-qubit gate via measurement-induced interaction between two photons.

© 2011 OSA

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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef]

2011

T. T. Ng, D. Gosal, A. Lamas-Linares, and C. Kurtsiefer, “Sagnac-loop phase shifter with polarization-independent operation,” Rev. Sci. Instrum. 82, 013106 (2011).
[CrossRef] [PubMed]

M. A. Hall, J. B. Altepeter, and P. Kumar, “Ultrafast switching of photonic entanglement,” Phys. Rev. Lett. 106, 053901 (2011).
[CrossRef] [PubMed]

X. S. Ma, B. Dakic, W. Naylor, A. Zeilinger, and P. Walther, “Quantum simulation of the wavefunction to probe frustrated Heisenberg spin systems,” Nat. Phys.(2011).
[CrossRef]

X. S. Ma, S. Zotter, J. Kofler, T. Jennewein, and A. Zeilinger, “Experimental generation of single photons via active multiplexing,” Phys. Rev. A 83, 043814 (2011).
[CrossRef]

2010

B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
[CrossRef] [PubMed]

T. D. Ladd, F. Jelezko, R. Laflamme, Y. Nakamura, C. Monroe, and J. L. O’Brien, “Quantum computers,” Nature 464, 45–53 (2010).
[CrossRef] [PubMed]

2009

V. Scarani, H. Bechmann-Pasquinucci, M. Dušek, N. Lütkenhaus, and M. Peev, “The security of practical quantum key distribution,” Rev. Mod. Phys. 81, 1301–1350 (2009).
[CrossRef]

J. C. F. Matthews, A. Politi, A. Stefanov, and J. L. O’Brien, “Manipulation of multiphoton entanglement in waveguide quantum circuits,” Nat. Photonics 3, 346–350 (2009).
[CrossRef]

2008

2007

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692–695 (2007).
[CrossRef]

J. H. Shapiro and F. N. Wong, “On-demand single-photon generation using a modular array of parametric down-converters with electro-optic polarization controls,” Opt. Lett. 32, 2698–2700 (2007).
[CrossRef] [PubMed]

P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, J. P. Dowling, and G. Milburn, “Linear optical quantum computing with photonic qubits,” Rev. Mod. Phys. 79, 135–174 (2007).
[CrossRef]

P. Böhi, R. Prevedel, T. Jennewein, A. Stefanov, F. Tiefenbacher, and A. Zeilinger, “Implementation and characterization of active feed-forward for deterministic linear optics quantum computing,” Appl. Phys. B 89, 499–505 (2007).
[CrossRef]

R. Prevedel, P. Walther, F. Tiefenbacher, P. Böhi, R. Kaltenbaek, T. Jennewein, and A. Zeilinger, “High-speed linear optics quantum computing using active feed-forward,” Nature 445, 65–69 (2007).
[CrossRef] [PubMed]

B. L. Higgins, D. W. Berry, S. D. Bartlett, H. M. Wiseman, and G. J. Pryde, “Entanglement-free Heisenberg-limited phase estimation,” Nature 450, 393–396 (2007).
[CrossRef] [PubMed]

2006

R. Kaltenbaek, B. Blauensteiner, M. Żukowski, M. Aspelmeyer, and A. Zeilinger, “Experimental interference of independent photons,” Phys. Rev. Lett. 96, 2405022006.
[CrossRef] [PubMed]

2005

N. K. Langford, T. J. Weinhold, R. Prevedel, K. J. Resch, A. Gilchrist, J. L. OBrien, G. J. Pryde, and A. G. White, “Demonstration of a simple entangling optical gate and its use in bell-state analysis,” Phys. Rev. Lett. 95, 2105042005.
[CrossRef] [PubMed]

N. Kiesel, C. Schmid, U. Weber, R. Ursin, and H. Weinfurter, “Linear optics controlled-phase gate made simple,” Phys. Rev. Lett. 95, 2105052005.
[CrossRef] [PubMed]

R. Okamoto, H. F. Hofmann, S. Takeuchi, and K. Sasaki, “Demonstration of an optical quantum controlled-not gate without path interference,” Phys. Rev. Lett. 95, 2105062005.
[CrossRef] [PubMed]

2002

A. L. Migdall, D. Branning, and S. Castelletto, “Tailoring single-photon and multiphoton probabilities of a single-photon on-demand source,” Phys. Rev. A 66, 053805 (2002).
[CrossRef]

T. Jennewein, G. Weihs, J. W. Pan, and A. Zeilinger, “Experimental nonlocality proof of quantum teleportation and entanglement swapping,” Phys. Rev. Lett. 88, 017903 (2002).
[CrossRef] [PubMed]

N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum crytography,” Rev. Mod. Phys. 74, 145–195 (2002).
[CrossRef]

2001

E. Knill, R. Laflamme, and G. J. Milburn, “A scheme for efficient quantum computation with linear optics,” Nature 409, 46–52 (2001).
[CrossRef] [PubMed]

R. Raussendorf and H. J. Briegel, “A one-way quantum computer,” Phys. Rev. Lett. 86, 5188–5191 (2001).
[CrossRef] [PubMed]

L. Eldada, “Advances in telecom and datacom optical components,” Opt. Eng. 40, 1165–1178 (2001).
[CrossRef]

1998

J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891–3894 (1998).
[CrossRef]

1997

D. Bouwmeester, J. W. Pan, K. Mattle, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575–579 (1997).
[CrossRef]

1994

K. Mattle, H. Weinfurter, P. G. Kwiat, and A. Zeilinger, “Dense Coding in Experimental Quantum Communication,” Phys. Rev. Lett. 76, 4656–4659 (1994).
[CrossRef]

M. Reck, A. Zeilinger, H. J. Bernstein, and P. Bertani, “Experimental realization of any discrete unitary operator,” Phys. Rev. Lett. 73, 58–61 (1994).
[CrossRef] [PubMed]

1987

C. K. Hong, Z. Y. Ou, and L. Mandel, “Measurement of subpicosecond time intervals between two photons by interference,” Phys. Rev. Lett. 59, 2044–2046 (1987).
[CrossRef] [PubMed]

Almeida, M. P.

B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
[CrossRef] [PubMed]

Altepeter, J. B.

M. A. Hall, J. B. Altepeter, and P. Kumar, “Ultrafast switching of photonic entanglement,” Phys. Rev. Lett. 106, 053901 (2011).
[CrossRef] [PubMed]

Aspelmeyer, M.

R. Kaltenbaek, B. Blauensteiner, M. Żukowski, M. Aspelmeyer, and A. Zeilinger, “Experimental interference of independent photons,” Phys. Rev. Lett. 96, 2405022006.
[CrossRef] [PubMed]

Aspuru-Guzik, A.

B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
[CrossRef] [PubMed]

Barbieri, M.

B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
[CrossRef] [PubMed]

Bartlett, S. D.

B. L. Higgins, D. W. Berry, S. D. Bartlett, H. M. Wiseman, and G. J. Pryde, “Entanglement-free Heisenberg-limited phase estimation,” Nature 450, 393–396 (2007).
[CrossRef] [PubMed]

Bechmann-Pasquinucci, H.

V. Scarani, H. Bechmann-Pasquinucci, M. Dušek, N. Lütkenhaus, and M. Peev, “The security of practical quantum key distribution,” Rev. Mod. Phys. 81, 1301–1350 (2009).
[CrossRef]

Bernstein, H. J.

M. Reck, A. Zeilinger, H. J. Bernstein, and P. Bertani, “Experimental realization of any discrete unitary operator,” Phys. Rev. Lett. 73, 58–61 (1994).
[CrossRef] [PubMed]

Berry, D. W.

B. L. Higgins, D. W. Berry, S. D. Bartlett, H. M. Wiseman, and G. J. Pryde, “Entanglement-free Heisenberg-limited phase estimation,” Nature 450, 393–396 (2007).
[CrossRef] [PubMed]

Bertani, P.

M. Reck, A. Zeilinger, H. J. Bernstein, and P. Bertani, “Experimental realization of any discrete unitary operator,” Phys. Rev. Lett. 73, 58–61 (1994).
[CrossRef] [PubMed]

Beveratos, A.

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692–695 (2007).
[CrossRef]

Biamonte, J. D.

B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
[CrossRef] [PubMed]

Blauensteiner, B.

R. Kaltenbaek, B. Blauensteiner, M. Żukowski, M. Aspelmeyer, and A. Zeilinger, “Experimental interference of independent photons,” Phys. Rev. Lett. 96, 2405022006.
[CrossRef] [PubMed]

Böhi, P.

P. Böhi, R. Prevedel, T. Jennewein, A. Stefanov, F. Tiefenbacher, and A. Zeilinger, “Implementation and characterization of active feed-forward for deterministic linear optics quantum computing,” Appl. Phys. B 89, 499–505 (2007).
[CrossRef]

R. Prevedel, P. Walther, F. Tiefenbacher, P. Böhi, R. Kaltenbaek, T. Jennewein, and A. Zeilinger, “High-speed linear optics quantum computing using active feed-forward,” Nature 445, 65–69 (2007).
[CrossRef] [PubMed]

Bouwmeester, D.

J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891–3894 (1998).
[CrossRef]

D. Bouwmeester, J. W. Pan, K. Mattle, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575–579 (1997).
[CrossRef]

Branning, D.

A. L. Migdall, D. Branning, and S. Castelletto, “Tailoring single-photon and multiphoton probabilities of a single-photon on-demand source,” Phys. Rev. A 66, 053805 (2002).
[CrossRef]

Briegel, H. J.

R. Raussendorf and H. J. Briegel, “A one-way quantum computer,” Phys. Rev. Lett. 86, 5188–5191 (2001).
[CrossRef] [PubMed]

Castelletto, S.

A. L. Migdall, D. Branning, and S. Castelletto, “Tailoring single-photon and multiphoton probabilities of a single-photon on-demand source,” Phys. Rev. A 66, 053805 (2002).
[CrossRef]

Chen, Z. B.

J. W. Pan, Z. B. Chen, M. Żukowski, H. Weinfurter, and A. Zeilinger, “Multi-photon entanglement and interferometry,” arXiv:0805.2853 (2008).

Cryan, M. J.

A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science 320, 646–649 (2008).
[CrossRef] [PubMed]

Dakic, B.

X. S. Ma, B. Dakic, W. Naylor, A. Zeilinger, and P. Walther, “Quantum simulation of the wavefunction to probe frustrated Heisenberg spin systems,” Nat. Phys.(2011).
[CrossRef]

Dowling, J. P.

P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, J. P. Dowling, and G. Milburn, “Linear optical quantum computing with photonic qubits,” Rev. Mod. Phys. 79, 135–174 (2007).
[CrossRef]

Dušek, M.

V. Scarani, H. Bechmann-Pasquinucci, M. Dušek, N. Lütkenhaus, and M. Peev, “The security of practical quantum key distribution,” Rev. Mod. Phys. 81, 1301–1350 (2009).
[CrossRef]

Eldada, L.

L. Eldada, “Advances in telecom and datacom optical components,” Opt. Eng. 40, 1165–1178 (2001).
[CrossRef]

Giacomini, S.

Gilchrist, A.

N. K. Langford, T. J. Weinhold, R. Prevedel, K. J. Resch, A. Gilchrist, J. L. OBrien, G. J. Pryde, and A. G. White, “Demonstration of a simple entangling optical gate and its use in bell-state analysis,” Phys. Rev. Lett. 95, 2105042005.
[CrossRef] [PubMed]

Gillett, G. G.

B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
[CrossRef] [PubMed]

Gisin, N.

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692–695 (2007).
[CrossRef]

N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum crytography,” Rev. Mod. Phys. 74, 145–195 (2002).
[CrossRef]

Goggin, M. E.

B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
[CrossRef] [PubMed]

Gosal, D.

T. T. Ng, D. Gosal, A. Lamas-Linares, and C. Kurtsiefer, “Sagnac-loop phase shifter with polarization-independent operation,” Rev. Sci. Instrum. 82, 013106 (2011).
[CrossRef] [PubMed]

Halder, M.

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692–695 (2007).
[CrossRef]

Hall, M. A.

M. A. Hall, J. B. Altepeter, and P. Kumar, “Ultrafast switching of photonic entanglement,” Phys. Rev. Lett. 106, 053901 (2011).
[CrossRef] [PubMed]

Higgins, B. L.

B. L. Higgins, D. W. Berry, S. D. Bartlett, H. M. Wiseman, and G. J. Pryde, “Entanglement-free Heisenberg-limited phase estimation,” Nature 450, 393–396 (2007).
[CrossRef] [PubMed]

Hofmann, H. F.

R. Okamoto, H. F. Hofmann, S. Takeuchi, and K. Sasaki, “Demonstration of an optical quantum controlled-not gate without path interference,” Phys. Rev. Lett. 95, 2105062005.
[CrossRef] [PubMed]

Hong, C. K.

C. K. Hong, Z. Y. Ou, and L. Mandel, “Measurement of subpicosecond time intervals between two photons by interference,” Phys. Rev. Lett. 59, 2044–2046 (1987).
[CrossRef] [PubMed]

Jelezko, F.

T. D. Ladd, F. Jelezko, R. Laflamme, Y. Nakamura, C. Monroe, and J. L. O’Brien, “Quantum computers,” Nature 464, 45–53 (2010).
[CrossRef] [PubMed]

Jennewein, T.

X. S. Ma, S. Zotter, J. Kofler, T. Jennewein, and A. Zeilinger, “Experimental generation of single photons via active multiplexing,” Phys. Rev. A 83, 043814 (2011).
[CrossRef]

P. Böhi, R. Prevedel, T. Jennewein, A. Stefanov, F. Tiefenbacher, and A. Zeilinger, “Implementation and characterization of active feed-forward for deterministic linear optics quantum computing,” Appl. Phys. B 89, 499–505 (2007).
[CrossRef]

R. Prevedel, P. Walther, F. Tiefenbacher, P. Böhi, R. Kaltenbaek, T. Jennewein, and A. Zeilinger, “High-speed linear optics quantum computing using active feed-forward,” Nature 445, 65–69 (2007).
[CrossRef] [PubMed]

T. Jennewein, G. Weihs, J. W. Pan, and A. Zeilinger, “Experimental nonlocality proof of quantum teleportation and entanglement swapping,” Phys. Rev. Lett. 88, 017903 (2002).
[CrossRef] [PubMed]

Kaltenbaek, R.

R. Prevedel, P. Walther, F. Tiefenbacher, P. Böhi, R. Kaltenbaek, T. Jennewein, and A. Zeilinger, “High-speed linear optics quantum computing using active feed-forward,” Nature 445, 65–69 (2007).
[CrossRef] [PubMed]

R. Kaltenbaek, B. Blauensteiner, M. Żukowski, M. Aspelmeyer, and A. Zeilinger, “Experimental interference of independent photons,” Phys. Rev. Lett. 96, 2405022006.
[CrossRef] [PubMed]

Kassal, I.

B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
[CrossRef] [PubMed]

Kiesel, N.

N. Kiesel, C. Schmid, U. Weber, R. Ursin, and H. Weinfurter, “Linear optics controlled-phase gate made simple,” Phys. Rev. Lett. 95, 2105052005.
[CrossRef] [PubMed]

Knill, E.

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V. Scarani, H. Bechmann-Pasquinucci, M. Dušek, N. Lütkenhaus, and M. Peev, “The security of practical quantum key distribution,” Rev. Mod. Phys. 81, 1301–1350 (2009).
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D. Bouwmeester, J. W. Pan, K. Mattle, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575–579 (1997).
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K. Mattle, H. Weinfurter, P. G. Kwiat, and A. Zeilinger, “Dense Coding in Experimental Quantum Communication,” Phys. Rev. Lett. 76, 4656–4659 (1994).
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E. Knill, R. Laflamme, and G. J. Milburn, “A scheme for efficient quantum computation with linear optics,” Nature 409, 46–52 (2001).
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B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
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P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, J. P. Dowling, and G. Milburn, “Linear optical quantum computing with photonic qubits,” Rev. Mod. Phys. 79, 135–174 (2007).
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X. S. Ma, B. Dakic, W. Naylor, A. Zeilinger, and P. Walther, “Quantum simulation of the wavefunction to probe frustrated Heisenberg spin systems,” Nat. Phys.(2011).
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P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, J. P. Dowling, and G. Milburn, “Linear optical quantum computing with photonic qubits,” Rev. Mod. Phys. 79, 135–174 (2007).
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T. T. Ng, D. Gosal, A. Lamas-Linares, and C. Kurtsiefer, “Sagnac-loop phase shifter with polarization-independent operation,” Rev. Sci. Instrum. 82, 013106 (2011).
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T. D. Ladd, F. Jelezko, R. Laflamme, Y. Nakamura, C. Monroe, and J. L. O’Brien, “Quantum computers,” Nature 464, 45–53 (2010).
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J. C. F. Matthews, A. Politi, A. Stefanov, and J. L. O’Brien, “Manipulation of multiphoton entanglement in waveguide quantum circuits,” Nat. Photonics 3, 346–350 (2009).
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A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science 320, 646–649 (2008).
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N. K. Langford, T. J. Weinhold, R. Prevedel, K. J. Resch, A. Gilchrist, J. L. OBrien, G. J. Pryde, and A. G. White, “Demonstration of a simple entangling optical gate and its use in bell-state analysis,” Phys. Rev. Lett. 95, 2105042005.
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C. K. Hong, Z. Y. Ou, and L. Mandel, “Measurement of subpicosecond time intervals between two photons by interference,” Phys. Rev. Lett. 59, 2044–2046 (1987).
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T. Jennewein, G. Weihs, J. W. Pan, and A. Zeilinger, “Experimental nonlocality proof of quantum teleportation and entanglement swapping,” Phys. Rev. Lett. 88, 017903 (2002).
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J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891–3894 (1998).
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D. Bouwmeester, J. W. Pan, K. Mattle, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575–579 (1997).
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J. W. Pan, Z. B. Chen, M. Żukowski, H. Weinfurter, and A. Zeilinger, “Multi-photon entanglement and interferometry,” arXiv:0805.2853 (2008).

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V. Scarani, H. Bechmann-Pasquinucci, M. Dušek, N. Lütkenhaus, and M. Peev, “The security of practical quantum key distribution,” Rev. Mod. Phys. 81, 1301–1350 (2009).
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J. C. F. Matthews, A. Politi, A. Stefanov, and J. L. O’Brien, “Manipulation of multiphoton entanglement in waveguide quantum circuits,” Nat. Photonics 3, 346–350 (2009).
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A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science 320, 646–649 (2008).
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B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
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P. Böhi, R. Prevedel, T. Jennewein, A. Stefanov, F. Tiefenbacher, and A. Zeilinger, “Implementation and characterization of active feed-forward for deterministic linear optics quantum computing,” Appl. Phys. B 89, 499–505 (2007).
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R. Prevedel, P. Walther, F. Tiefenbacher, P. Böhi, R. Kaltenbaek, T. Jennewein, and A. Zeilinger, “High-speed linear optics quantum computing using active feed-forward,” Nature 445, 65–69 (2007).
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N. K. Langford, T. J. Weinhold, R. Prevedel, K. J. Resch, A. Gilchrist, J. L. OBrien, G. J. Pryde, and A. G. White, “Demonstration of a simple entangling optical gate and its use in bell-state analysis,” Phys. Rev. Lett. 95, 2105042005.
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B. L. Higgins, D. W. Berry, S. D. Bartlett, H. M. Wiseman, and G. J. Pryde, “Entanglement-free Heisenberg-limited phase estimation,” Nature 450, 393–396 (2007).
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N. K. Langford, T. J. Weinhold, R. Prevedel, K. J. Resch, A. Gilchrist, J. L. OBrien, G. J. Pryde, and A. G. White, “Demonstration of a simple entangling optical gate and its use in bell-state analysis,” Phys. Rev. Lett. 95, 2105042005.
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P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, J. P. Dowling, and G. Milburn, “Linear optical quantum computing with photonic qubits,” Rev. Mod. Phys. 79, 135–174 (2007).
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A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science 320, 646–649 (2008).
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N. K. Langford, T. J. Weinhold, R. Prevedel, K. J. Resch, A. Gilchrist, J. L. OBrien, G. J. Pryde, and A. G. White, “Demonstration of a simple entangling optical gate and its use in bell-state analysis,” Phys. Rev. Lett. 95, 2105042005.
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N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum crytography,” Rev. Mod. Phys. 74, 145–195 (2002).
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R. Okamoto, H. F. Hofmann, S. Takeuchi, and K. Sasaki, “Demonstration of an optical quantum controlled-not gate without path interference,” Phys. Rev. Lett. 95, 2105062005.
[CrossRef] [PubMed]

Scarani, V.

V. Scarani, H. Bechmann-Pasquinucci, M. Dušek, N. Lütkenhaus, and M. Peev, “The security of practical quantum key distribution,” Rev. Mod. Phys. 81, 1301–1350 (2009).
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M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692–695 (2007).
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N. Kiesel, C. Schmid, U. Weber, R. Ursin, and H. Weinfurter, “Linear optics controlled-phase gate made simple,” Phys. Rev. Lett. 95, 2105052005.
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Shapiro, J. H.

Simon, C.

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692–695 (2007).
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Stefanov, A.

J. C. F. Matthews, A. Politi, A. Stefanov, and J. L. O’Brien, “Manipulation of multiphoton entanglement in waveguide quantum circuits,” Nat. Photonics 3, 346–350 (2009).
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P. Böhi, R. Prevedel, T. Jennewein, A. Stefanov, F. Tiefenbacher, and A. Zeilinger, “Implementation and characterization of active feed-forward for deterministic linear optics quantum computing,” Appl. Phys. B 89, 499–505 (2007).
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R. Okamoto, H. F. Hofmann, S. Takeuchi, and K. Sasaki, “Demonstration of an optical quantum controlled-not gate without path interference,” Phys. Rev. Lett. 95, 2105062005.
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P. Böhi, R. Prevedel, T. Jennewein, A. Stefanov, F. Tiefenbacher, and A. Zeilinger, “Implementation and characterization of active feed-forward for deterministic linear optics quantum computing,” Appl. Phys. B 89, 499–505 (2007).
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R. Prevedel, P. Walther, F. Tiefenbacher, P. Böhi, R. Kaltenbaek, T. Jennewein, and A. Zeilinger, “High-speed linear optics quantum computing using active feed-forward,” Nature 445, 65–69 (2007).
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N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum crytography,” Rev. Mod. Phys. 74, 145–195 (2002).
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N. Kiesel, C. Schmid, U. Weber, R. Ursin, and H. Weinfurter, “Linear optics controlled-phase gate made simple,” Phys. Rev. Lett. 95, 2105052005.
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Walther, P.

X. S. Ma, B. Dakic, W. Naylor, A. Zeilinger, and P. Walther, “Quantum simulation of the wavefunction to probe frustrated Heisenberg spin systems,” Nat. Phys.(2011).
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R. Prevedel, P. Walther, F. Tiefenbacher, P. Böhi, R. Kaltenbaek, T. Jennewein, and A. Zeilinger, “High-speed linear optics quantum computing using active feed-forward,” Nature 445, 65–69 (2007).
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N. Kiesel, C. Schmid, U. Weber, R. Ursin, and H. Weinfurter, “Linear optics controlled-phase gate made simple,” Phys. Rev. Lett. 95, 2105052005.
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T. Jennewein, G. Weihs, J. W. Pan, and A. Zeilinger, “Experimental nonlocality proof of quantum teleportation and entanglement swapping,” Phys. Rev. Lett. 88, 017903 (2002).
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N. Kiesel, C. Schmid, U. Weber, R. Ursin, and H. Weinfurter, “Linear optics controlled-phase gate made simple,” Phys. Rev. Lett. 95, 2105052005.
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J. W. Pan, Z. B. Chen, M. Żukowski, H. Weinfurter, and A. Zeilinger, “Multi-photon entanglement and interferometry,” arXiv:0805.2853 (2008).

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N. K. Langford, T. J. Weinhold, R. Prevedel, K. J. Resch, A. Gilchrist, J. L. OBrien, G. J. Pryde, and A. G. White, “Demonstration of a simple entangling optical gate and its use in bell-state analysis,” Phys. Rev. Lett. 95, 2105042005.
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B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
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N. K. Langford, T. J. Weinhold, R. Prevedel, K. J. Resch, A. Gilchrist, J. L. OBrien, G. J. Pryde, and A. G. White, “Demonstration of a simple entangling optical gate and its use in bell-state analysis,” Phys. Rev. Lett. 95, 2105042005.
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B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
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B. L. Higgins, D. W. Berry, S. D. Bartlett, H. M. Wiseman, and G. J. Pryde, “Entanglement-free Heisenberg-limited phase estimation,” Nature 450, 393–396 (2007).
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Wong, F. N.

Yu, S.

A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science 320, 646–649 (2008).
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M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692–695 (2007).
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N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum crytography,” Rev. Mod. Phys. 74, 145–195 (2002).
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Zeilinger, A.

X. S. Ma, S. Zotter, J. Kofler, T. Jennewein, and A. Zeilinger, “Experimental generation of single photons via active multiplexing,” Phys. Rev. A 83, 043814 (2011).
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X. S. Ma, B. Dakic, W. Naylor, A. Zeilinger, and P. Walther, “Quantum simulation of the wavefunction to probe frustrated Heisenberg spin systems,” Nat. Phys.(2011).
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P. Böhi, R. Prevedel, T. Jennewein, A. Stefanov, F. Tiefenbacher, and A. Zeilinger, “Implementation and characterization of active feed-forward for deterministic linear optics quantum computing,” Appl. Phys. B 89, 499–505 (2007).
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R. Prevedel, P. Walther, F. Tiefenbacher, P. Böhi, R. Kaltenbaek, T. Jennewein, and A. Zeilinger, “High-speed linear optics quantum computing using active feed-forward,” Nature 445, 65–69 (2007).
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R. Kaltenbaek, B. Blauensteiner, M. Żukowski, M. Aspelmeyer, and A. Zeilinger, “Experimental interference of independent photons,” Phys. Rev. Lett. 96, 2405022006.
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T. Jennewein, G. Weihs, J. W. Pan, and A. Zeilinger, “Experimental nonlocality proof of quantum teleportation and entanglement swapping,” Phys. Rev. Lett. 88, 017903 (2002).
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[CrossRef]

D. Bouwmeester, J. W. Pan, K. Mattle, H. Weinfurter, and A. Zeilinger, “Experimental quantum teleportation,” Nature 390, 575–579 (1997).
[CrossRef]

K. Mattle, H. Weinfurter, P. G. Kwiat, and A. Zeilinger, “Dense Coding in Experimental Quantum Communication,” Phys. Rev. Lett. 76, 4656–4659 (1994).
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M. Reck, A. Zeilinger, H. J. Bernstein, and P. Bertani, “Experimental realization of any discrete unitary operator,” Phys. Rev. Lett. 73, 58–61 (1994).
[CrossRef] [PubMed]

J. W. Pan, Z. B. Chen, M. Żukowski, H. Weinfurter, and A. Zeilinger, “Multi-photon entanglement and interferometry,” arXiv:0805.2853 (2008).

Zotter, S.

X. S. Ma, S. Zotter, J. Kofler, T. Jennewein, and A. Zeilinger, “Experimental generation of single photons via active multiplexing,” Phys. Rev. A 83, 043814 (2011).
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R. Kaltenbaek, B. Blauensteiner, M. Żukowski, M. Aspelmeyer, and A. Zeilinger, “Experimental interference of independent photons,” Phys. Rev. Lett. 96, 2405022006.
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J. W. Pan, Z. B. Chen, M. Żukowski, H. Weinfurter, and A. Zeilinger, “Multi-photon entanglement and interferometry,” arXiv:0805.2853 (2008).

Appl. Phys. B

P. Böhi, R. Prevedel, T. Jennewein, A. Stefanov, F. Tiefenbacher, and A. Zeilinger, “Implementation and characterization of active feed-forward for deterministic linear optics quantum computing,” Appl. Phys. B 89, 499–505 (2007).
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Nat. Chem.

B. P. Lanyon, J. D. Whitfield, G. G. Gillett, M. E. Goggin, M. P. Almeida, I. Kassal, J. D. Biamonte, M. Mohseni, B. J. Powell, M. Barbieri, A. Aspuru-Guzik, and A. G. White, “Towards quantum chemistry on a quantum computer,” Nat. Chem. 2, 106–1112010.
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Nat. Photonics

J. C. F. Matthews, A. Politi, A. Stefanov, and J. L. O’Brien, “Manipulation of multiphoton entanglement in waveguide quantum circuits,” Nat. Photonics 3, 346–350 (2009).
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Nat. Phys.

M. Halder, A. Beveratos, N. Gisin, V. Scarani, C. Simon, and H. Zbinden, “Entangling independent photons by time measurement,” Nat. Phys. 3, 692–695 (2007).
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X. S. Ma, B. Dakic, W. Naylor, A. Zeilinger, and P. Walther, “Quantum simulation of the wavefunction to probe frustrated Heisenberg spin systems,” Nat. Phys.(2011).
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E. Knill, R. Laflamme, and G. J. Milburn, “A scheme for efficient quantum computation with linear optics,” Nature 409, 46–52 (2001).
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T. D. Ladd, F. Jelezko, R. Laflamme, Y. Nakamura, C. Monroe, and J. L. O’Brien, “Quantum computers,” Nature 464, 45–53 (2010).
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R. Prevedel, P. Walther, F. Tiefenbacher, P. Böhi, R. Kaltenbaek, T. Jennewein, and A. Zeilinger, “High-speed linear optics quantum computing using active feed-forward,” Nature 445, 65–69 (2007).
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Opt. Lett.

Phys. Rev. A

X. S. Ma, S. Zotter, J. Kofler, T. Jennewein, and A. Zeilinger, “Experimental generation of single photons via active multiplexing,” Phys. Rev. A 83, 043814 (2011).
[CrossRef]

A. L. Migdall, D. Branning, and S. Castelletto, “Tailoring single-photon and multiphoton probabilities of a single-photon on-demand source,” Phys. Rev. A 66, 053805 (2002).
[CrossRef]

Phys. Rev. Lett.

R. Raussendorf and H. J. Briegel, “A one-way quantum computer,” Phys. Rev. Lett. 86, 5188–5191 (2001).
[CrossRef] [PubMed]

J. W. Pan, D. Bouwmeester, H. Weinfurter, and A. Zeilinger, “Experimental entanglement swapping: entangling photons that never interacted,” Phys. Rev. Lett. 80, 3891–3894 (1998).
[CrossRef]

T. Jennewein, G. Weihs, J. W. Pan, and A. Zeilinger, “Experimental nonlocality proof of quantum teleportation and entanglement swapping,” Phys. Rev. Lett. 88, 017903 (2002).
[CrossRef] [PubMed]

M. Reck, A. Zeilinger, H. J. Bernstein, and P. Bertani, “Experimental realization of any discrete unitary operator,” Phys. Rev. Lett. 73, 58–61 (1994).
[CrossRef] [PubMed]

C. K. Hong, Z. Y. Ou, and L. Mandel, “Measurement of subpicosecond time intervals between two photons by interference,” Phys. Rev. Lett. 59, 2044–2046 (1987).
[CrossRef] [PubMed]

K. Mattle, H. Weinfurter, P. G. Kwiat, and A. Zeilinger, “Dense Coding in Experimental Quantum Communication,” Phys. Rev. Lett. 76, 4656–4659 (1994).
[CrossRef]

R. Kaltenbaek, B. Blauensteiner, M. Żukowski, M. Aspelmeyer, and A. Zeilinger, “Experimental interference of independent photons,” Phys. Rev. Lett. 96, 2405022006.
[CrossRef] [PubMed]

M. A. Hall, J. B. Altepeter, and P. Kumar, “Ultrafast switching of photonic entanglement,” Phys. Rev. Lett. 106, 053901 (2011).
[CrossRef] [PubMed]

N. K. Langford, T. J. Weinhold, R. Prevedel, K. J. Resch, A. Gilchrist, J. L. OBrien, G. J. Pryde, and A. G. White, “Demonstration of a simple entangling optical gate and its use in bell-state analysis,” Phys. Rev. Lett. 95, 2105042005.
[CrossRef] [PubMed]

N. Kiesel, C. Schmid, U. Weber, R. Ursin, and H. Weinfurter, “Linear optics controlled-phase gate made simple,” Phys. Rev. Lett. 95, 2105052005.
[CrossRef] [PubMed]

R. Okamoto, H. F. Hofmann, S. Takeuchi, and K. Sasaki, “Demonstration of an optical quantum controlled-not gate without path interference,” Phys. Rev. Lett. 95, 2105062005.
[CrossRef] [PubMed]

Rev. Mod. Phys.

N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, “Quantum crytography,” Rev. Mod. Phys. 74, 145–195 (2002).
[CrossRef]

P. Kok, W. J. Munro, K. Nemoto, T. C. Ralph, J. P. Dowling, and G. Milburn, “Linear optical quantum computing with photonic qubits,” Rev. Mod. Phys. 79, 135–174 (2007).
[CrossRef]

V. Scarani, H. Bechmann-Pasquinucci, M. Dušek, N. Lütkenhaus, and M. Peev, “The security of practical quantum key distribution,” Rev. Mod. Phys. 81, 1301–1350 (2009).
[CrossRef]

Rev. Sci. Instrum.

T. T. Ng, D. Gosal, A. Lamas-Linares, and C. Kurtsiefer, “Sagnac-loop phase shifter with polarization-independent operation,” Rev. Sci. Instrum. 82, 013106 (2011).
[CrossRef] [PubMed]

Science

A. Politi, M. J. Cryan, J. G. Rarity, S. Yu, and J. L. O’Brien, “Silica-on-silicon waveguide quantum circuits,” Science 320, 646–649 (2008).
[CrossRef] [PubMed]

Other

http://www.leysop.com/ .

J. W. Pan, Z. B. Chen, M. Żukowski, H. Weinfurter, and A. Zeilinger, “Multi-photon entanglement and interferometry,” arXiv:0805.2853 (2008).

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