Observation of cross phase modulation in cold atom gradient echo memory

Author:

Leung Anthony CORCID,Melody K S IdaORCID,Tranter Aaron DORCID,Paul Karun V,Campbell Geoff T,Lam Ping KoyORCID,Buchler Ben CORCID

Abstract

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.

Funder

Australian Research Council Centres of Excellence Centre for Quantum Computation and Communication Technology

Publisher

IOP Publishing

Subject

General Physics and Astronomy

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Complete four-dimensional Bell state measurement using weak cross-Kerr nonlinearity;Journal of the Optical Society of America B;2024-06-05

2. Broadband quantum memory in atomic ensembles;Advances In Atomic, Molecular, and Optical Physics;2023

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