Abstract

We study the storage and retrieval of images in a hot atomic vapor using the gradient echo memory protocol. We demonstrate that this technique allows for the storage of multiple spatial modes. We study both spatial and temporal multiplexing by storing a sequence of two different images in the atomic vapor. The effect of atomic diffusion on the spatial resolution is discussed and characterized experimentally. For short storage time a normalized spatial cross-correlation between a retrieved image and its input of 88 % is reported.

© 2012 OSA

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    [CrossRef] [PubMed]
  2. N. Sangouard, C. Simon, H. de Riedmatten, and N. Gisin, “Quantum repeaters based on atomic ensembles and linear optics,” Rev. Mod. Phys.83, 33–80 (2011).
    [CrossRef]
  3. N. Sangouard, C. Simon, B. Zhao, Y.-A. Chen, H. de Riedmatten, J.-W. Pan, and N. Gisin, “Robust and efficient quantum repeaters with atomic ensembles and linear optics,” Phys. Rev. A77, 062301 (2008).
    [CrossRef]
  4. C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
    [CrossRef]
  5. A. Lvovsky, B. Sanders, and W. Tittel, “Optical quantum memory,” Nat. Photonics3, 706–714 (2009).
    [CrossRef]
  6. W. J. Munro, K. A. Harrison, A. M. Stephens, S. J. Devitt, and K. Nemoto, “From quantum multiplexing to high-performance quantum networking,” Nat. Photonics4, 792–796 (2010).
    [CrossRef]
  7. C. Simon, H. de Riedmatten, and M. Afzelius, “Temporally multiplexed quantum repeaters with atomic gases,” Phys. Rev. A82, 010304 (2010).
    [CrossRef]
  8. M. Afzelius, C. Simon, H. de Riedmatten, and N. Gisin, “Multimode quantum memory based on atomic frequency combs,” Phys. Rev. A79, 052329 (2009).
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  9. M. Bonarota and J. Le Gouët, “Highly multimode storage in a crystal,” New. J. Phys.13, 013013 (2011).
    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
  12. M. Hosseini, B. M. Sparkes, G. Hetet, J. J. Longdell, P. K. Lam, and B. C. Buchler, “Coherent optical pulse sequencer for quantum applications,” Nature461, 241–245 (2009).
    [CrossRef] [PubMed]
  13. K. Surmacz, J. Nunn, K. Reim, K. C. Lee, V. O. Lorenz, B. Sussman, I. A. Walmsley, and D. Jaksch, “Efficient spatially resolved multimode quantum memory,” Phys. Rev. A78, 033806 (2008).
    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
  20. M. Hosseini, G. Campbell, B. M. Sparkes, P. K. Lam, and B. C. Buchler, “Unconditional room-temperature quantum memory,” Nat. Phys.7, 794–798 (2011).
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  23. O. Firstenberg, M. Shuker, R. Pugatch, D. Fredkin, N. Davidson, and A. Ron, “Theory of thermal motion in electromagnetically induced transparency: Effects of diffusion, Doppler broadening, and Dicke and Ramsey narrowing,” Phys. Rev. A77, 043830 (2008).
    [CrossRef]
  24. C. Cohen-Tannoudji, J. Dupont-Roc, and G. Grynberg, Atom Photon Interactions: Basic Process and Applications (Wiley Science, 2008).
  25. F. Franz, “Rubidium spin relaxation in the rare gases under ultraclean conditions,” Phys. Rev.139, A603–A611 (1965).
    [CrossRef]
  26. W. Franzen, “Spin relaxation of optically aligned rubidium vapor,” Phys. Rev.115, 850–856 (1959).
    [CrossRef]
  27. M. Lukin, “Colloquium: Trapping and manipulating photon states in atomic ensembles,” Rev. Mod. Phys.75, 457–472 (2003).
    [CrossRef]
  28. M. Fleischhauer and M. Lukin, “Quantum memory for photons: dark-state polaritons,” Phys. Rev. A65, 022314 (2002).
    [CrossRef]
  29. L. Zhao, T. Wang, Y. Xiao, and S. F. Yelin, “Image storage in hot vapors,” Phys. Rev. A77, 041802 (2008).
    [CrossRef]

2011

N. Sangouard, C. Simon, H. de Riedmatten, and N. Gisin, “Quantum repeaters based on atomic ensembles and linear optics,” Rev. Mod. Phys.83, 33–80 (2011).
[CrossRef]

M. Bonarota and J. Le Gouët, “Highly multimode storage in a crystal,” New. J. Phys.13, 013013 (2011).
[CrossRef]

I. H. Agha, C. Giarmatzi, Q. Glorieux, T. Coudreau, P. Grangier, and G. Messin, “Time-resolved detection of relative-intensity squeezed nanosecond pulses in an 87Rb vapor,” New J. Phys.13, 043030 (2011).
[CrossRef]

M. Hosseini, B. M. Sparkes, G. Campbell, P. K. Lam, and B. C. Buchler, “High efficiency coherent optical memory with warm rubidium vapour,” Nat. Commun.2, 174 (2011).
[CrossRef] [PubMed]

M. Hosseini, G. Campbell, B. M. Sparkes, P. K. Lam, and B. C. Buchler, “Unconditional room-temperature quantum memory,” Nat. Phys.7, 794–798 (2011).
[CrossRef]

2010

W. J. Munro, K. A. Harrison, A. M. Stephens, S. J. Devitt, and K. Nemoto, “From quantum multiplexing to high-performance quantum networking,” Nat. Photonics4, 792–796 (2010).
[CrossRef]

C. Simon, H. de Riedmatten, and M. Afzelius, “Temporally multiplexed quantum repeaters with atomic gases,” Phys. Rev. A82, 010304 (2010).
[CrossRef]

C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
[CrossRef]

2009

A. Lvovsky, B. Sanders, and W. Tittel, “Optical quantum memory,” Nat. Photonics3, 706–714 (2009).
[CrossRef]

M. Afzelius, C. Simon, H. de Riedmatten, and N. Gisin, “Multimode quantum memory based on atomic frequency combs,” Phys. Rev. A79, 052329 (2009).
[CrossRef]

M. Hosseini, B. M. Sparkes, G. Hetet, J. J. Longdell, P. K. Lam, and B. C. Buchler, “Coherent optical pulse sequencer for quantum applications,” Nature461, 241–245 (2009).
[CrossRef] [PubMed]

S. Y. Lan, A. G. Radnaev, O. A. Collins, D. N. Matsukevich, T. A. B. Kennedy, and A. Kuzmich, “A multiplexed quantum memory,” Opt. Express17, 13639–13645 (2009).
[CrossRef] [PubMed]

2008

O. Firstenberg, M. Shuker, R. Pugatch, D. Fredkin, N. Davidson, and A. Ron, “Theory of thermal motion in electromagnetically induced transparency: Effects of diffusion, Doppler broadening, and Dicke and Ramsey narrowing,” Phys. Rev. A77, 043830 (2008).
[CrossRef]

L. Zhao, T. Wang, Y. Xiao, and S. F. Yelin, “Image storage in hot vapors,” Phys. Rev. A77, 041802 (2008).
[CrossRef]

H. J. Kimble, “The quantum internet,” Nature453, 1023–1030 (2008).
[CrossRef] [PubMed]

G. Hétet, M. Hosseini, B. Sparkes, D. Oblak, P. K. Lam, and B. C. Buchler, “Photon echoes generated by reversing magnetic field gradients in a rubidium vapor,” Opt. Lett.33, 2323–2325 (2008).
[CrossRef] [PubMed]

K. Surmacz, J. Nunn, K. Reim, K. C. Lee, V. O. Lorenz, B. Sussman, I. A. Walmsley, and D. Jaksch, “Efficient spatially resolved multimode quantum memory,” Phys. Rev. A78, 033806 (2008).
[CrossRef]

M. Shuker, O. Firstenberg, R. Pugatch, A. Ron, and N. Davidson, “Storing images in warm atomic vapor,” Phys. Rev. Lett.100, 223601 (2008).
[CrossRef] [PubMed]

K. Vudyasetu, R. M. Camacho, and J. C. Howell, “Storage and retrieval of multimode transverse images in hot atomic rubidium vapor,” Phys. Rev. Lett.100, 123903 (2008).
[CrossRef] [PubMed]

V. Boyer, A. M. Marino, R. C. Pooser, and P. D. Lett, “Production of entangled images by four-wave mixing,” Science321, 544–547 (2008).
[CrossRef] [PubMed]

N. Sangouard, C. Simon, B. Zhao, Y.-A. Chen, H. de Riedmatten, J.-W. Pan, and N. Gisin, “Robust and efficient quantum repeaters with atomic ensembles and linear optics,” Phys. Rev. A77, 062301 (2008).
[CrossRef]

2007

O. Collins, S. Jenkins, A. Kuzmich, and T. Kennedy, “Multiplexed memory-insensitive quantum repeaters,” Phys. Rev. Lett.98, 060502 (2007).
[CrossRef] [PubMed]

2003

M. Lukin, “Colloquium: Trapping and manipulating photon states in atomic ensembles,” Rev. Mod. Phys.75, 457–472 (2003).
[CrossRef]

2002

M. Fleischhauer and M. Lukin, “Quantum memory for photons: dark-state polaritons,” Phys. Rev. A65, 022314 (2002).
[CrossRef]

1995

H. Sasaki, K. Karaki, M. Mitsunaga, and N. Uesugi, “Holographic motion picture: theory and observations,” J. Lumin.64, 273–281 (1995).
[CrossRef]

1994

1965

F. Franz, “Rubidium spin relaxation in the rare gases under ultraclean conditions,” Phys. Rev.139, A603–A611 (1965).
[CrossRef]

1959

W. Franzen, “Spin relaxation of optically aligned rubidium vapor,” Phys. Rev.115, 850–856 (1959).
[CrossRef]

Afzelius, M.

C. Simon, H. de Riedmatten, and M. Afzelius, “Temporally multiplexed quantum repeaters with atomic gases,” Phys. Rev. A82, 010304 (2010).
[CrossRef]

C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
[CrossRef]

M. Afzelius, C. Simon, H. de Riedmatten, and N. Gisin, “Multimode quantum memory based on atomic frequency combs,” Phys. Rev. A79, 052329 (2009).
[CrossRef]

Agha, I. H.

I. H. Agha, C. Giarmatzi, Q. Glorieux, T. Coudreau, P. Grangier, and G. Messin, “Time-resolved detection of relative-intensity squeezed nanosecond pulses in an 87Rb vapor,” New J. Phys.13, 043030 (2011).
[CrossRef]

Appel, J.

C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
[CrossRef]

Bonarota, M.

M. Bonarota and J. Le Gouët, “Highly multimode storage in a crystal,” New. J. Phys.13, 013013 (2011).
[CrossRef]

Boyer, V.

V. Boyer, A. M. Marino, R. C. Pooser, and P. D. Lett, “Production of entangled images by four-wave mixing,” Science321, 544–547 (2008).
[CrossRef] [PubMed]

Boyer de la Giroday, A.

C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
[CrossRef]

Buchler, B. C.

M. Hosseini, B. M. Sparkes, G. Campbell, P. K. Lam, and B. C. Buchler, “High efficiency coherent optical memory with warm rubidium vapour,” Nat. Commun.2, 174 (2011).
[CrossRef] [PubMed]

M. Hosseini, G. Campbell, B. M. Sparkes, P. K. Lam, and B. C. Buchler, “Unconditional room-temperature quantum memory,” Nat. Phys.7, 794–798 (2011).
[CrossRef]

M. Hosseini, B. M. Sparkes, G. Hetet, J. J. Longdell, P. K. Lam, and B. C. Buchler, “Coherent optical pulse sequencer for quantum applications,” Nature461, 241–245 (2009).
[CrossRef] [PubMed]

G. Hétet, M. Hosseini, B. Sparkes, D. Oblak, P. K. Lam, and B. C. Buchler, “Photon echoes generated by reversing magnetic field gradients in a rubidium vapor,” Opt. Lett.33, 2323–2325 (2008).
[CrossRef] [PubMed]

Camacho, R. M.

K. Vudyasetu, R. M. Camacho, and J. C. Howell, “Storage and retrieval of multimode transverse images in hot atomic rubidium vapor,” Phys. Rev. Lett.100, 123903 (2008).
[CrossRef] [PubMed]

Campbell, G.

M. Hosseini, G. Campbell, B. M. Sparkes, P. K. Lam, and B. C. Buchler, “Unconditional room-temperature quantum memory,” Nat. Phys.7, 794–798 (2011).
[CrossRef]

M. Hosseini, B. M. Sparkes, G. Campbell, P. K. Lam, and B. C. Buchler, “High efficiency coherent optical memory with warm rubidium vapour,” Nat. Commun.2, 174 (2011).
[CrossRef] [PubMed]

Chen, Y.-A.

N. Sangouard, C. Simon, B. Zhao, Y.-A. Chen, H. de Riedmatten, J.-W. Pan, and N. Gisin, “Robust and efficient quantum repeaters with atomic ensembles and linear optics,” Phys. Rev. A77, 062301 (2008).
[CrossRef]

Cohen-Tannoudji, C.

C. Cohen-Tannoudji, J. Dupont-Roc, and G. Grynberg, Atom Photon Interactions: Basic Process and Applications (Wiley Science, 2008).

Collins, O.

O. Collins, S. Jenkins, A. Kuzmich, and T. Kennedy, “Multiplexed memory-insensitive quantum repeaters,” Phys. Rev. Lett.98, 060502 (2007).
[CrossRef] [PubMed]

Collins, O. A.

Coudreau, T.

I. H. Agha, C. Giarmatzi, Q. Glorieux, T. Coudreau, P. Grangier, and G. Messin, “Time-resolved detection of relative-intensity squeezed nanosecond pulses in an 87Rb vapor,” New J. Phys.13, 043030 (2011).
[CrossRef]

Davidson, N.

O. Firstenberg, M. Shuker, R. Pugatch, D. Fredkin, N. Davidson, and A. Ron, “Theory of thermal motion in electromagnetically induced transparency: Effects of diffusion, Doppler broadening, and Dicke and Ramsey narrowing,” Phys. Rev. A77, 043830 (2008).
[CrossRef]

M. Shuker, O. Firstenberg, R. Pugatch, A. Ron, and N. Davidson, “Storing images in warm atomic vapor,” Phys. Rev. Lett.100, 223601 (2008).
[CrossRef] [PubMed]

de Riedmatten, H.

N. Sangouard, C. Simon, H. de Riedmatten, and N. Gisin, “Quantum repeaters based on atomic ensembles and linear optics,” Rev. Mod. Phys.83, 33–80 (2011).
[CrossRef]

C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
[CrossRef]

C. Simon, H. de Riedmatten, and M. Afzelius, “Temporally multiplexed quantum repeaters with atomic gases,” Phys. Rev. A82, 010304 (2010).
[CrossRef]

M. Afzelius, C. Simon, H. de Riedmatten, and N. Gisin, “Multimode quantum memory based on atomic frequency combs,” Phys. Rev. A79, 052329 (2009).
[CrossRef]

N. Sangouard, C. Simon, B. Zhao, Y.-A. Chen, H. de Riedmatten, J.-W. Pan, and N. Gisin, “Robust and efficient quantum repeaters with atomic ensembles and linear optics,” Phys. Rev. A77, 062301 (2008).
[CrossRef]

Devitt, S. J.

W. J. Munro, K. A. Harrison, A. M. Stephens, S. J. Devitt, and K. Nemoto, “From quantum multiplexing to high-performance quantum networking,” Nat. Photonics4, 792–796 (2010).
[CrossRef]

Dewhurst, S. J.

C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
[CrossRef]

Dupont-Roc, J.

C. Cohen-Tannoudji, J. Dupont-Roc, and G. Grynberg, Atom Photon Interactions: Basic Process and Applications (Wiley Science, 2008).

Firstenberg, O.

M. Shuker, O. Firstenberg, R. Pugatch, A. Ron, and N. Davidson, “Storing images in warm atomic vapor,” Phys. Rev. Lett.100, 223601 (2008).
[CrossRef] [PubMed]

O. Firstenberg, M. Shuker, R. Pugatch, D. Fredkin, N. Davidson, and A. Ron, “Theory of thermal motion in electromagnetically induced transparency: Effects of diffusion, Doppler broadening, and Dicke and Ramsey narrowing,” Phys. Rev. A77, 043830 (2008).
[CrossRef]

Fleischhauer, M.

M. Fleischhauer and M. Lukin, “Quantum memory for photons: dark-state polaritons,” Phys. Rev. A65, 022314 (2002).
[CrossRef]

Franz, F.

F. Franz, “Rubidium spin relaxation in the rare gases under ultraclean conditions,” Phys. Rev.139, A603–A611 (1965).
[CrossRef]

Franzen, W.

W. Franzen, “Spin relaxation of optically aligned rubidium vapor,” Phys. Rev.115, 850–856 (1959).
[CrossRef]

Fredkin, D.

O. Firstenberg, M. Shuker, R. Pugatch, D. Fredkin, N. Davidson, and A. Ron, “Theory of thermal motion in electromagnetically induced transparency: Effects of diffusion, Doppler broadening, and Dicke and Ramsey narrowing,” Phys. Rev. A77, 043830 (2008).
[CrossRef]

Giarmatzi, C.

I. H. Agha, C. Giarmatzi, Q. Glorieux, T. Coudreau, P. Grangier, and G. Messin, “Time-resolved detection of relative-intensity squeezed nanosecond pulses in an 87Rb vapor,” New J. Phys.13, 043030 (2011).
[CrossRef]

Gisin, N.

N. Sangouard, C. Simon, H. de Riedmatten, and N. Gisin, “Quantum repeaters based on atomic ensembles and linear optics,” Rev. Mod. Phys.83, 33–80 (2011).
[CrossRef]

C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
[CrossRef]

M. Afzelius, C. Simon, H. de Riedmatten, and N. Gisin, “Multimode quantum memory based on atomic frequency combs,” Phys. Rev. A79, 052329 (2009).
[CrossRef]

N. Sangouard, C. Simon, B. Zhao, Y.-A. Chen, H. de Riedmatten, J.-W. Pan, and N. Gisin, “Robust and efficient quantum repeaters with atomic ensembles and linear optics,” Phys. Rev. A77, 062301 (2008).
[CrossRef]

Glorieux, Q.

I. H. Agha, C. Giarmatzi, Q. Glorieux, T. Coudreau, P. Grangier, and G. Messin, “Time-resolved detection of relative-intensity squeezed nanosecond pulses in an 87Rb vapor,” New J. Phys.13, 043030 (2011).
[CrossRef]

Grangier, P.

I. H. Agha, C. Giarmatzi, Q. Glorieux, T. Coudreau, P. Grangier, and G. Messin, “Time-resolved detection of relative-intensity squeezed nanosecond pulses in an 87Rb vapor,” New J. Phys.13, 043030 (2011).
[CrossRef]

Grynberg, G.

C. Cohen-Tannoudji, J. Dupont-Roc, and G. Grynberg, Atom Photon Interactions: Basic Process and Applications (Wiley Science, 2008).

Harrison, K. A.

W. J. Munro, K. A. Harrison, A. M. Stephens, S. J. Devitt, and K. Nemoto, “From quantum multiplexing to high-performance quantum networking,” Nat. Photonics4, 792–796 (2010).
[CrossRef]

Hetet, G.

M. Hosseini, B. M. Sparkes, G. Hetet, J. J. Longdell, P. K. Lam, and B. C. Buchler, “Coherent optical pulse sequencer for quantum applications,” Nature461, 241–245 (2009).
[CrossRef] [PubMed]

Hétet, G.

Hosseini, M.

M. Hosseini, G. Campbell, B. M. Sparkes, P. K. Lam, and B. C. Buchler, “Unconditional room-temperature quantum memory,” Nat. Phys.7, 794–798 (2011).
[CrossRef]

M. Hosseini, B. M. Sparkes, G. Campbell, P. K. Lam, and B. C. Buchler, “High efficiency coherent optical memory with warm rubidium vapour,” Nat. Commun.2, 174 (2011).
[CrossRef] [PubMed]

M. Hosseini, B. M. Sparkes, G. Hetet, J. J. Longdell, P. K. Lam, and B. C. Buchler, “Coherent optical pulse sequencer for quantum applications,” Nature461, 241–245 (2009).
[CrossRef] [PubMed]

G. Hétet, M. Hosseini, B. Sparkes, D. Oblak, P. K. Lam, and B. C. Buchler, “Photon echoes generated by reversing magnetic field gradients in a rubidium vapor,” Opt. Lett.33, 2323–2325 (2008).
[CrossRef] [PubMed]

Howell, J. C.

K. Vudyasetu, R. M. Camacho, and J. C. Howell, “Storage and retrieval of multimode transverse images in hot atomic rubidium vapor,” Phys. Rev. Lett.100, 123903 (2008).
[CrossRef] [PubMed]

Hu, C. Y.

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M. Hosseini, G. Campbell, B. M. Sparkes, P. K. Lam, and B. C. Buchler, “Unconditional room-temperature quantum memory,” Nat. Phys.7, 794–798 (2011).
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M. Hosseini, B. M. Sparkes, G. Campbell, P. K. Lam, and B. C. Buchler, “High efficiency coherent optical memory with warm rubidium vapour,” Nat. Commun.2, 174 (2011).
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W. J. Munro, K. A. Harrison, A. M. Stephens, S. J. Devitt, and K. Nemoto, “From quantum multiplexing to high-performance quantum networking,” Nat. Photonics4, 792–796 (2010).
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H. Sasaki, K. Karaki, M. Mitsunaga, and N. Uesugi, “Holographic motion picture: theory and observations,” J. Lumin.64, 273–281 (1995).
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C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
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C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
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C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
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N. Sangouard, C. Simon, B. Zhao, Y.-A. Chen, H. de Riedmatten, J.-W. Pan, and N. Gisin, “Robust and efficient quantum repeaters with atomic ensembles and linear optics,” Phys. Rev. A77, 062301 (2008).
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Eur. Phys. J. D

C. Simon, M. Afzelius, J. Appel, A. Boyer de la Giroday, S. J. Dewhurst, N. Gisin, C. Y. Hu, F. Jelezko, S. Kroll, J. H. Mller, J. Nunn, E. S. Polzik, J. G. Rarity, H. de Riedmatten, W. Rosenfeld, A. J. Shields, N. Skold, R. M. Stevenson, R. Thew, I. A. Walmsley, M. C. Weber, H. Weinfurter, J. Wrachtrup, and R. J. Young, “Quantum memories,” Eur. Phys. J. D58, 1–22 (2010).
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J. Lumin.

H. Sasaki, K. Karaki, M. Mitsunaga, and N. Uesugi, “Holographic motion picture: theory and observations,” J. Lumin.64, 273–281 (1995).
[CrossRef]

Nat. Commun.

M. Hosseini, B. M. Sparkes, G. Campbell, P. K. Lam, and B. C. Buchler, “High efficiency coherent optical memory with warm rubidium vapour,” Nat. Commun.2, 174 (2011).
[CrossRef] [PubMed]

Nat. Photonics

A. Lvovsky, B. Sanders, and W. Tittel, “Optical quantum memory,” Nat. Photonics3, 706–714 (2009).
[CrossRef]

W. J. Munro, K. A. Harrison, A. M. Stephens, S. J. Devitt, and K. Nemoto, “From quantum multiplexing to high-performance quantum networking,” Nat. Photonics4, 792–796 (2010).
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Figures (4)

Fig. 1
Fig. 1

Schematic of the experimental setup for image storage in a GEM. The signal beam is previously shaped temporally with an acousto-optic-modulator (not shown). The spatial profile is fixed using a mask in the beam path and the mask is then imaged into the 85Rb cell with a magnification of 0.75. A control field is overlapped with the signal using a polarizing beam splitter (PBS), and finally, the retrieved image is recorded using a fast–gated intensified camera. A small fraction of the signal is sent to a fast photodiode for monitoring the spatially-integrated retrieved power. For the storage of two consecutive images, two signal beams are combined with the same polarization on a non-polarizing beam splitter. Inset: three-level system for 85Rb.

Fig. 2
Fig. 2

Storage and retrieval of two images in a GEM. (a) The spatially-integrated intensity from the retrieval of the single letter T (blue) and N (red). The input pulse is at negative time and the retrieved pulse is at the symmetric positive time after the magnetic field gradient flip. The yellow curve shows the storage of two images, and the curves are vertically displaced for clarity. Retrieved images at time 0.3 μs and 2.7 μs are presented, respectively, in Fig. 2(a), i and ii. (b) The detailed timeline of the retrieved images for 7 frames. The frame number is indicated in the images and the time corresponds to the time after the magnetic flip. (c) SN (red) and ST (blue) as function of the frame number. The reference for N or T has a similarity of 1 and is plotted before 0.

Fig. 3
Fig. 3

(a) The input and retrieved pulses for three different delays. Time t = 0 is taken to be the time of the magnetic field flip. The maximum of the input pulses are at −1.4 μs, −1.1 μs, −0.8 μs (respectively green, red, and black curves). (b) The input images for horizontal (H) and vertical (V) lines. 1/2a is the spatial frequency of the bars, where the distance between a black and a white line is denoted a. (c) Contrast for the retrieved image (vertical) as function of storage time for 21 frames. The symbol colors correspond to those in a).

Fig. 4
Fig. 4

(a) Contrast and theoretical fit for four images such as shown in Fig. 3(b), with bar widths, a, as indicated in the figure. The fits are done without free parameters using Eq (3). D = 105 cm2/s, t0 = 0 and C0 is given in the legend. (b) Modulation transfer function for four different storage times.

Equations (4)

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S = i , j N i j in N i j echo i , j ( N i j in ) 2 i , j ( N i j echo ) 2 ,
t ρ ( x , y , z , t ) = D 2 ρ ( x , y , z , t ) ,
ρ ( x , y , t ) = 1 4 π D t e ( x x ) 2 ( y y ) 2 4 D t ρ ( x , y , 0 ) d x d y .
C ( t ) = I ( x = a , t ) I ( x = 0 , t ) I ( x = a , t ) + I ( x = 0 , t ) ,

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