Observation of cross phase modulation in cold atom gradient echo memory

Anthony C. Leung; K. S.Ida Melody; Aaron D. Tranter; Karun V. Paul; Geoff T. Campbell; Ping Koy Lam; Ben C. Buchler

doi:10.1088/1367-2630/ac8c64

Observation of cross phase modulation in cold atom gradient echo memory

Anthony C. Leung, K. S.Ida Melody, Aaron D. Tranter, Karun V. Paul, Geoff T. Campbell, Ping Koy Lam, Ben C. Buchler^*

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

Strong nonlinear interactions between single photons have important applications in optical quantum information processing. Demonstrations of these interactions in cold atomic ensembles have largely been limited to exploiting slow light generated using electromagnetically induced transparency (EIT). However, these EIT implementations have limited achievable phase shifts due to spontaneous emission. Here, we demonstrate and characterize a scheme free from these limitations using gradient echo memory with inferred single photon phase shifts of 0.07 ± 0.02 μrad. Excellent agreement with theoretical modelling was observed. Degradation of memory efficiency was observed for large phase shifts but strategies to overcome that are presented.

Original language	English
Article number	093011
Journal	New Journal of Physics
Volume	24
Issue number	9
DOIs	https://doi.org/10.1088/1367-2630/ac8c64
Publication status	Published - 1 Sept 2022

Access to Document

10.1088/1367-2630/ac8c64

Cite this

@article{bd05ac5c24584757a95c01b689c8a6b0,

title = "Observation of cross phase modulation in cold atom gradient echo memory",

abstract = "Strong nonlinear interactions between single photons have important applications in optical quantum information processing. Demonstrations of these interactions in cold atomic ensembles have largely been limited to exploiting slow light generated using electromagnetically induced transparency (EIT). However, these EIT implementations have limited achievable phase shifts due to spontaneous emission. Here, we demonstrate and characterize a scheme free from these limitations using gradient echo memory with inferred single photon phase shifts of 0.07 ± 0.02 μrad. Excellent agreement with theoretical modelling was observed. Degradation of memory efficiency was observed for large phase shifts but strategies to overcome that are presented.",

keywords = "quantum gates, quantum memory, single photons",

author = "Leung, {Anthony C.} and Melody, {K. S.Ida} and Tranter, {Aaron D.} and Paul, {Karun V.} and Campbell, {Geoff T.} and Lam, {Ping Koy} and Buchler, {Ben C.}",

note = "Publisher Copyright: {\textcopyright} 2022 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.",

year = "2022",

month = sep,

day = "1",

doi = "10.1088/1367-2630/ac8c64",

language = "English",

volume = "24",

journal = "New Journal of Physics",

publisher = "IOP Publishing Ltd.",

number = "9",

}

TY - JOUR

T1 - Observation of cross phase modulation in cold atom gradient echo memory

AU - Leung, Anthony C.

AU - Melody, K. S.Ida

AU - Tranter, Aaron D.

AU - Paul, Karun V.

AU - Campbell, Geoff T.

AU - Lam, Ping Koy

AU - Buchler, Ben C.

PY - 2022/9/1

Y1 - 2022/9/1

N2 - Strong nonlinear interactions between single photons have important applications in optical quantum information processing. Demonstrations of these interactions in cold atomic ensembles have largely been limited to exploiting slow light generated using electromagnetically induced transparency (EIT). However, these EIT implementations have limited achievable phase shifts due to spontaneous emission. Here, we demonstrate and characterize a scheme free from these limitations using gradient echo memory with inferred single photon phase shifts of 0.07 ± 0.02 μrad. Excellent agreement with theoretical modelling was observed. Degradation of memory efficiency was observed for large phase shifts but strategies to overcome that are presented.

AB - Strong nonlinear interactions between single photons have important applications in optical quantum information processing. Demonstrations of these interactions in cold atomic ensembles have largely been limited to exploiting slow light generated using electromagnetically induced transparency (EIT). However, these EIT implementations have limited achievable phase shifts due to spontaneous emission. Here, we demonstrate and characterize a scheme free from these limitations using gradient echo memory with inferred single photon phase shifts of 0.07 ± 0.02 μrad. Excellent agreement with theoretical modelling was observed. Degradation of memory efficiency was observed for large phase shifts but strategies to overcome that are presented.

KW - quantum gates

KW - quantum memory

KW - single photons

UR - http://www.scopus.com/inward/record.url?scp=85138074141&partnerID=8YFLogxK

U2 - 10.1088/1367-2630/ac8c64

DO - 10.1088/1367-2630/ac8c64

M3 - Article

VL - 24

JO - New Journal of Physics

JF - New Journal of Physics

IS - 9

M1 - 093011

ER -

Observation of cross phase modulation in cold atom gradient echo memory

Abstract

Access to Document

Other files and links

Fingerprint

Cite this