C. F. Wildfeuer, A. J. Pearlman, J. Chen, J. Fan, A. Migdall, and J. P. Dowling, “Resolution and sensitivity of a Fabry-Perot interferometer with a photon-number-resolving detector,” Phys. Rev. A, 80, 043822 (2009).

[CrossRef]

V. Giovannetti, S. Lloyd, L. Maccone, and J. Shapiro, “Sub-Rayleigh-diffraction-bound quantum imaging,” Phys. Rev. A 79, 013827 (2009).

[CrossRef]

Seth Lloyd, “Enhanced sensitivity of photodetection via quantum illumination,” Science 321, 1463 (2008).

[CrossRef]
[PubMed]

J. P. Dowling, “Quantum optical metrology - the lowdown on high-NOON States,” Contemp. Phys. 49, 125 (2008).

[CrossRef]

Ryan T. Glasser, Hugo Cable, and Jonathan P. Dowling, Francesco De Martini, Fabio Sciarrino, and Chiara Vitelli, “Entanglement-seeded, dual, optical parametric amplification: Applications to quantum imaging and metrology,” Phys. Rev. A 78, 012339 (2008).

[CrossRef]

Mark A. Rubin and Sumanth Kaushik , “Loss-induced limits to phase measurement precision with maximally entangled states,” Phys. Rev. A 75, 053805 (2007),

[CrossRef]

T. Nagata, R. Okamoto, J. L. O’Brien, K. Sasaki, and S. Takeuchi, “Beating the standard quantum limit with four entangled photons,” Science 316, 726 (2007).

[CrossRef]
[PubMed]

G. Khoury, H. S. Eisenberg, E. J. S. Fonseca, and D. Bouwmeester, “Nonlinear Interferometry via Fock-State Projection,” Phys. Rev. Lett 96, 203601 (2006).

[CrossRef]
[PubMed]

P. R. Hemmer, A. Muthukrishnan, M. O. Scully, and M. S. Zubairy, “Quantum Lithography with Classical Light,” Phys. Rev. Lett. 96, 163603 (2006).

[CrossRef]
[PubMed]

N. Treps, N. Grosse, W. P. Bowen, C. Fabre, H.-A. Bachor, and P. K. Lam, “A Quantum Laser Pointer.” Science 301, 940 (2003).

[CrossRef]
[PubMed]

A. J. Miller, S. Nam, J. M. Martinis, and A. V. Sergienko “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).

[CrossRef]

M. D’Angelo, M. V. Chekhova, and Y. Shih, “Two-photon diffraction and quantum lithography,” Phys. Rev. Lett. 87, 013602 (2001).

[CrossRef]
[PubMed]

N. Boto, P. Kok, D. S. Abrams, S. L. Braunstein, C. P. Williams, and J. P. Dowling, “Quantum interferometric optical lithography: Exploiting entanglement to beat the diffraction limit,” Phys. Rev. Lett. 85, 2733–2736 (2000).

[CrossRef]
[PubMed]

J. J. Bollinger, W. M.
Itano, D. J. Wineland, and D. J.
Heinzen, “Optimal frequency measurements with maximally correlated states,” Phys. Rev. A 54, R4649–R4652 (1996).

[CrossRef]
[PubMed]

C. M. Caves, “Quantum-mechanical noise in an interferometer,” Phys. Rev. D 23, 1693 (1981).

[CrossRef]

N. Boto, P. Kok, D. S. Abrams, S. L. Braunstein, C. P. Williams, and J. P. Dowling, “Quantum interferometric optical lithography: Exploiting entanglement to beat the diffraction limit,” Phys. Rev. Lett. 85, 2733–2736 (2000).

[CrossRef]
[PubMed]

N. Treps, N. Grosse, W. P. Bowen, C. Fabre, H.-A. Bachor, and P. K. Lam, “A Quantum Laser Pointer.” Science 301, 940 (2003).

[CrossRef]
[PubMed]

J. J. Bollinger, W. M.
Itano, D. J. Wineland, and D. J.
Heinzen, “Optimal frequency measurements with maximally correlated states,” Phys. Rev. A 54, R4649–R4652 (1996).

[CrossRef]
[PubMed]

N. Boto, P. Kok, D. S. Abrams, S. L. Braunstein, C. P. Williams, and J. P. Dowling, “Quantum interferometric optical lithography: Exploiting entanglement to beat the diffraction limit,” Phys. Rev. Lett. 85, 2733–2736 (2000).

[CrossRef]
[PubMed]

G. Khoury, H. S. Eisenberg, E. J. S. Fonseca, and D. Bouwmeester, “Nonlinear Interferometry via Fock-State Projection,” Phys. Rev. Lett 96, 203601 (2006).

[CrossRef]
[PubMed]

N. Treps, N. Grosse, W. P. Bowen, C. Fabre, H.-A. Bachor, and P. K. Lam, “A Quantum Laser Pointer.” Science 301, 940 (2003).

[CrossRef]
[PubMed]

N. Boto, P. Kok, D. S. Abrams, S. L. Braunstein, C. P. Williams, and J. P. Dowling, “Quantum interferometric optical lithography: Exploiting entanglement to beat the diffraction limit,” Phys. Rev. Lett. 85, 2733–2736 (2000).

[CrossRef]
[PubMed]

Ryan T. Glasser, Hugo Cable, and Jonathan P. Dowling, Francesco De Martini, Fabio Sciarrino, and Chiara Vitelli, “Entanglement-seeded, dual, optical parametric amplification: Applications to quantum imaging and metrology,” Phys. Rev. A 78, 012339 (2008).

[CrossRef]

C. M. Caves, “Quantum-mechanical noise in an interferometer,” Phys. Rev. D 23, 1693 (1981).

[CrossRef]

M. D’Angelo, M. V. Chekhova, and Y. Shih, “Two-photon diffraction and quantum lithography,” Phys. Rev. Lett. 87, 013602 (2001).

[CrossRef]
[PubMed]

C. F. Wildfeuer, A. J. Pearlman, J. Chen, J. Fan, A. Migdall, and J. P. Dowling, “Resolution and sensitivity of a Fabry-Perot interferometer with a photon-number-resolving detector,” Phys. Rev. A, 80, 043822 (2009).

[CrossRef]

M. D’Angelo, M. V. Chekhova, and Y. Shih, “Two-photon diffraction and quantum lithography,” Phys. Rev. Lett. 87, 013602 (2001).

[CrossRef]
[PubMed]

C. F. Wildfeuer, A. J. Pearlman, J. Chen, J. Fan, A. Migdall, and J. P. Dowling, “Resolution and sensitivity of a Fabry-Perot interferometer with a photon-number-resolving detector,” Phys. Rev. A, 80, 043822 (2009).

[CrossRef]

J. P. Dowling, “Quantum optical metrology - the lowdown on high-NOON States,” Contemp. Phys. 49, 125 (2008).

[CrossRef]

N. Boto, P. Kok, D. S. Abrams, S. L. Braunstein, C. P. Williams, and J. P. Dowling, “Quantum interferometric optical lithography: Exploiting entanglement to beat the diffraction limit,” Phys. Rev. Lett. 85, 2733–2736 (2000).

[CrossRef]
[PubMed]

Ryan T. Glasser, Hugo Cable, and Jonathan P. Dowling, Francesco De Martini, Fabio Sciarrino, and Chiara Vitelli, “Entanglement-seeded, dual, optical parametric amplification: Applications to quantum imaging and metrology,” Phys. Rev. A 78, 012339 (2008).

[CrossRef]

G. Khoury, H. S. Eisenberg, E. J. S. Fonseca, and D. Bouwmeester, “Nonlinear Interferometry via Fock-State Projection,” Phys. Rev. Lett 96, 203601 (2006).

[CrossRef]
[PubMed]

N. Treps, N. Grosse, W. P. Bowen, C. Fabre, H.-A. Bachor, and P. K. Lam, “A Quantum Laser Pointer.” Science 301, 940 (2003).

[CrossRef]
[PubMed]

C. F. Wildfeuer, A. J. Pearlman, J. Chen, J. Fan, A. Migdall, and J. P. Dowling, “Resolution and sensitivity of a Fabry-Perot interferometer with a photon-number-resolving detector,” Phys. Rev. A, 80, 043822 (2009).

[CrossRef]

G. Khoury, H. S. Eisenberg, E. J. S. Fonseca, and D. Bouwmeester, “Nonlinear Interferometry via Fock-State Projection,” Phys. Rev. Lett 96, 203601 (2006).

[CrossRef]
[PubMed]

C. C. Gerry and P. L. Knight, Introductory Quantum Optics (Cambridge University Press, Cambridge, 2005).

V. Giovannetti, S. Lloyd, L. Maccone, and J. Shapiro, “Sub-Rayleigh-diffraction-bound quantum imaging,” Phys. Rev. A 79, 013827 (2009).

[CrossRef]

Ryan T. Glasser, Hugo Cable, and Jonathan P. Dowling, Francesco De Martini, Fabio Sciarrino, and Chiara Vitelli, “Entanglement-seeded, dual, optical parametric amplification: Applications to quantum imaging and metrology,” Phys. Rev. A 78, 012339 (2008).

[CrossRef]

N. Treps, N. Grosse, W. P. Bowen, C. Fabre, H.-A. Bachor, and P. K. Lam, “A Quantum Laser Pointer.” Science 301, 940 (2003).

[CrossRef]
[PubMed]

J. J. Bollinger, W. M.
Itano, D. J. Wineland, and D. J.
Heinzen, “Optimal frequency measurements with maximally correlated states,” Phys. Rev. A 54, R4649–R4652 (1996).

[CrossRef]
[PubMed]

P. R. Hemmer, A. Muthukrishnan, M. O. Scully, and M. S. Zubairy, “Quantum Lithography with Classical Light,” Phys. Rev. Lett. 96, 163603 (2006).

[CrossRef]
[PubMed]

J. J. Bollinger, W. M.
Itano, D. J. Wineland, and D. J.
Heinzen, “Optimal frequency measurements with maximally correlated states,” Phys. Rev. A 54, R4649–R4652 (1996).

[CrossRef]
[PubMed]

Mark A. Rubin and Sumanth Kaushik , “Loss-induced limits to phase measurement precision with maximally entangled states,” Phys. Rev. A 75, 053805 (2007),

[CrossRef]

G. Khoury, H. S. Eisenberg, E. J. S. Fonseca, and D. Bouwmeester, “Nonlinear Interferometry via Fock-State Projection,” Phys. Rev. Lett 96, 203601 (2006).

[CrossRef]
[PubMed]

C. C. Gerry and P. L. Knight, Introductory Quantum Optics (Cambridge University Press, Cambridge, 2005).

N. Boto, P. Kok, D. S. Abrams, S. L. Braunstein, C. P. Williams, and J. P. Dowling, “Quantum interferometric optical lithography: Exploiting entanglement to beat the diffraction limit,” Phys. Rev. Lett. 85, 2733–2736 (2000).

[CrossRef]
[PubMed]

N. Treps, N. Grosse, W. P. Bowen, C. Fabre, H.-A. Bachor, and P. K. Lam, “A Quantum Laser Pointer.” Science 301, 940 (2003).

[CrossRef]
[PubMed]

V. Giovannetti, S. Lloyd, L. Maccone, and J. Shapiro, “Sub-Rayleigh-diffraction-bound quantum imaging,” Phys. Rev. A 79, 013827 (2009).

[CrossRef]

Seth Lloyd, “Enhanced sensitivity of photodetection via quantum illumination,” Science 321, 1463 (2008).

[CrossRef]
[PubMed]

V. Giovannetti, S. Lloyd, L. Maccone, and J. Shapiro, “Sub-Rayleigh-diffraction-bound quantum imaging,” Phys. Rev. A 79, 013827 (2009).

[CrossRef]

A. J. Miller, S. Nam, J. M. Martinis, and A. V. Sergienko “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).

[CrossRef]

C. F. Wildfeuer, A. J. Pearlman, J. Chen, J. Fan, A. Migdall, and J. P. Dowling, “Resolution and sensitivity of a Fabry-Perot interferometer with a photon-number-resolving detector,” Phys. Rev. A, 80, 043822 (2009).

[CrossRef]

A. J. Miller, S. Nam, J. M. Martinis, and A. V. Sergienko “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).

[CrossRef]

P. R. Hemmer, A. Muthukrishnan, M. O. Scully, and M. S. Zubairy, “Quantum Lithography with Classical Light,” Phys. Rev. Lett. 96, 163603 (2006).

[CrossRef]
[PubMed]

T. Nagata, R. Okamoto, J. L. O’Brien, K. Sasaki, and S. Takeuchi, “Beating the standard quantum limit with four entangled photons,” Science 316, 726 (2007).

[CrossRef]
[PubMed]

A. J. Miller, S. Nam, J. M. Martinis, and A. V. Sergienko “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).

[CrossRef]

T. Nagata, R. Okamoto, J. L. O’Brien, K. Sasaki, and S. Takeuchi, “Beating the standard quantum limit with four entangled photons,” Science 316, 726 (2007).

[CrossRef]
[PubMed]

T. Nagata, R. Okamoto, J. L. O’Brien, K. Sasaki, and S. Takeuchi, “Beating the standard quantum limit with four entangled photons,” Science 316, 726 (2007).

[CrossRef]
[PubMed]

C. F. Wildfeuer, A. J. Pearlman, J. Chen, J. Fan, A. Migdall, and J. P. Dowling, “Resolution and sensitivity of a Fabry-Perot interferometer with a photon-number-resolving detector,” Phys. Rev. A, 80, 043822 (2009).

[CrossRef]

Mark A. Rubin and Sumanth Kaushik , “Loss-induced limits to phase measurement precision with maximally entangled states,” Phys. Rev. A 75, 053805 (2007),

[CrossRef]

T. Nagata, R. Okamoto, J. L. O’Brien, K. Sasaki, and S. Takeuchi, “Beating the standard quantum limit with four entangled photons,” Science 316, 726 (2007).

[CrossRef]
[PubMed]

P. R. Hemmer, A. Muthukrishnan, M. O. Scully, and M. S. Zubairy, “Quantum Lithography with Classical Light,” Phys. Rev. Lett. 96, 163603 (2006).

[CrossRef]
[PubMed]

A. J. Miller, S. Nam, J. M. Martinis, and A. V. Sergienko “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).

[CrossRef]

V. Giovannetti, S. Lloyd, L. Maccone, and J. Shapiro, “Sub-Rayleigh-diffraction-bound quantum imaging,” Phys. Rev. A 79, 013827 (2009).

[CrossRef]

M. D’Angelo, M. V. Chekhova, and Y. Shih, “Two-photon diffraction and quantum lithography,” Phys. Rev. Lett. 87, 013602 (2001).

[CrossRef]
[PubMed]

T. Nagata, R. Okamoto, J. L. O’Brien, K. Sasaki, and S. Takeuchi, “Beating the standard quantum limit with four entangled photons,” Science 316, 726 (2007).

[CrossRef]
[PubMed]

N. Treps, N. Grosse, W. P. Bowen, C. Fabre, H.-A. Bachor, and P. K. Lam, “A Quantum Laser Pointer.” Science 301, 940 (2003).

[CrossRef]
[PubMed]

C. F. Wildfeuer, A. J. Pearlman, J. Chen, J. Fan, A. Migdall, and J. P. Dowling, “Resolution and sensitivity of a Fabry-Perot interferometer with a photon-number-resolving detector,” Phys. Rev. A, 80, 043822 (2009).

[CrossRef]

N. Boto, P. Kok, D. S. Abrams, S. L. Braunstein, C. P. Williams, and J. P. Dowling, “Quantum interferometric optical lithography: Exploiting entanglement to beat the diffraction limit,” Phys. Rev. Lett. 85, 2733–2736 (2000).

[CrossRef]
[PubMed]

J. J. Bollinger, W. M.
Itano, D. J. Wineland, and D. J.
Heinzen, “Optimal frequency measurements with maximally correlated states,” Phys. Rev. A 54, R4649–R4652 (1996).

[CrossRef]
[PubMed]

P. R. Hemmer, A. Muthukrishnan, M. O. Scully, and M. S. Zubairy, “Quantum Lithography with Classical Light,” Phys. Rev. Lett. 96, 163603 (2006).

[CrossRef]
[PubMed]

A. J. Miller, S. Nam, J. M. Martinis, and A. V. Sergienko “Demonstration of a low-noise near-infrared photon counter with multiphoton discrimination,” Appl. Phys. Lett. 83, 791 (2003).

[CrossRef]

J. P. Dowling, “Quantum optical metrology - the lowdown on high-NOON States,” Contemp. Phys. 49, 125 (2008).

[CrossRef]

V. Giovannetti, S. Lloyd, L. Maccone, and J. Shapiro, “Sub-Rayleigh-diffraction-bound quantum imaging,” Phys. Rev. A 79, 013827 (2009).

[CrossRef]

Mark A. Rubin and Sumanth Kaushik , “Loss-induced limits to phase measurement precision with maximally entangled states,” Phys. Rev. A 75, 053805 (2007),

[CrossRef]

J. J. Bollinger, W. M.
Itano, D. J. Wineland, and D. J.
Heinzen, “Optimal frequency measurements with maximally correlated states,” Phys. Rev. A 54, R4649–R4652 (1996).

[CrossRef]
[PubMed]

Ryan T. Glasser, Hugo Cable, and Jonathan P. Dowling, Francesco De Martini, Fabio Sciarrino, and Chiara Vitelli, “Entanglement-seeded, dual, optical parametric amplification: Applications to quantum imaging and metrology,” Phys. Rev. A 78, 012339 (2008).

[CrossRef]

C. F. Wildfeuer, A. J. Pearlman, J. Chen, J. Fan, A. Migdall, and J. P. Dowling, “Resolution and sensitivity of a Fabry-Perot interferometer with a photon-number-resolving detector,” Phys. Rev. A, 80, 043822 (2009).

[CrossRef]

C. M. Caves, “Quantum-mechanical noise in an interferometer,” Phys. Rev. D 23, 1693 (1981).

[CrossRef]

G. Khoury, H. S. Eisenberg, E. J. S. Fonseca, and D. Bouwmeester, “Nonlinear Interferometry via Fock-State Projection,” Phys. Rev. Lett 96, 203601 (2006).

[CrossRef]
[PubMed]

P. R. Hemmer, A. Muthukrishnan, M. O. Scully, and M. S. Zubairy, “Quantum Lithography with Classical Light,” Phys. Rev. Lett. 96, 163603 (2006).

[CrossRef]
[PubMed]

N. Boto, P. Kok, D. S. Abrams, S. L. Braunstein, C. P. Williams, and J. P. Dowling, “Quantum interferometric optical lithography: Exploiting entanglement to beat the diffraction limit,” Phys. Rev. Lett. 85, 2733–2736 (2000).

[CrossRef]
[PubMed]

M. D’Angelo, M. V. Chekhova, and Y. Shih, “Two-photon diffraction and quantum lithography,” Phys. Rev. Lett. 87, 013602 (2001).

[CrossRef]
[PubMed]

Seth Lloyd, “Enhanced sensitivity of photodetection via quantum illumination,” Science 321, 1463 (2008).

[CrossRef]
[PubMed]

T. Nagata, R. Okamoto, J. L. O’Brien, K. Sasaki, and S. Takeuchi, “Beating the standard quantum limit with four entangled photons,” Science 316, 726 (2007).

[CrossRef]
[PubMed]

N. Treps, N. Grosse, W. P. Bowen, C. Fabre, H.-A. Bachor, and P. K. Lam, “A Quantum Laser Pointer.” Science 301, 940 (2003).

[CrossRef]
[PubMed]

Lord Rayleigh, Philos. Mag. 8, 261 (1879).

C. C. Gerry and P. L. Knight, Introductory Quantum Optics (Cambridge University Press, Cambridge, 2005).