Theory of noise suppression in Λ -type quantum memories by means of a cavity

J. Nunn; J. H. D. Munns; S. E. Thomas; Krzysztof T. Kaczmarek; ChangHua Qiu; Amir Feizpour; E Poem; B. Brecht; D. E. J. Saunders; Patrick M. Ledingham; Dileep V. Reddy; M. G. Raymer; I. A. Walmsley

doi:10.1103/PhysRevA.96.012338

Theory of noise suppression in Λ -type quantum memories by means of a cavity

J. Nunn, J. H. D. Munns, S. E. Thomas, Krzysztof T. Kaczmarek, ChangHua Qiu, Amir Feizpour, E Poem, B. Brecht, D. E. J. Saunders, Patrick M. Ledingham, Dileep V. Reddy, M. G. Raymer, I. A. Walmsley

Department of Physics

Research output: Contribution to journal › Article › peer-review

36 Citations (SciVal)

Abstract

Quantum memories, capable of storing single photons or other quantum states of light, to be retrieved on demand, offer a route to large-scale quantum information processing with light. A promising class of memories is based on far-off-resonant Raman absorption in ensembles of Λ-type atoms. However, at room temperature these systems exhibit unwanted four-wave mixing, which is prohibitive for applications at the single-photon level. Here, we show how this noise can be suppressed by placing the storage medium inside a moderate-finesse optical cavity, thereby removing the main roadblock hindering this approach to quantum memory.

Original language	English
Article number	012338
Journal	Physical Review A
Volume	96
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevA.96.012338
Publication status	Published - 31 Jul 2017

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.96.012338

https://arxiv.org/abs/1601.00157

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title = "Theory of noise suppression in Λ -type quantum memories by means of a cavity",

abstract = "Quantum memories, capable of storing single photons or other quantum states of light, to be retrieved on demand, offer a route to large-scale quantum information processing with light. A promising class of memories is based on far-off-resonant Raman absorption in ensembles of Λ-type atoms. However, at room temperature these systems exhibit unwanted four-wave mixing, which is prohibitive for applications at the single-photon level. Here, we show how this noise can be suppressed by placing the storage medium inside a moderate-finesse optical cavity, thereby removing the main roadblock hindering this approach to quantum memory.",

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AU - Nunn, J.

AU - Munns, J. H. D.

AU - Thomas, S. E.

AU - Kaczmarek, Krzysztof T.

AU - Qiu, ChangHua

AU - Feizpour, Amir

AU - Poem, E

AU - Brecht, B.

AU - Saunders, D. E. J.

AU - Ledingham, Patrick M.

AU - Reddy, Dileep V.

AU - Raymer, M. G.

AU - Walmsley, I. A.

PY - 2017/7/31

Y1 - 2017/7/31

N2 - Quantum memories, capable of storing single photons or other quantum states of light, to be retrieved on demand, offer a route to large-scale quantum information processing with light. A promising class of memories is based on far-off-resonant Raman absorption in ensembles of Λ-type atoms. However, at room temperature these systems exhibit unwanted four-wave mixing, which is prohibitive for applications at the single-photon level. Here, we show how this noise can be suppressed by placing the storage medium inside a moderate-finesse optical cavity, thereby removing the main roadblock hindering this approach to quantum memory.

AB - Quantum memories, capable of storing single photons or other quantum states of light, to be retrieved on demand, offer a route to large-scale quantum information processing with light. A promising class of memories is based on far-off-resonant Raman absorption in ensembles of Λ-type atoms. However, at room temperature these systems exhibit unwanted four-wave mixing, which is prohibitive for applications at the single-photon level. Here, we show how this noise can be suppressed by placing the storage medium inside a moderate-finesse optical cavity, thereby removing the main roadblock hindering this approach to quantum memory.

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Theory of noise suppression in Λ -type quantum memories by means of a cavity

Abstract

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