Storing short single-photon-level optical pulses in Bose-Einstein condensates for high-performance quantum memory

• URL: http://arxiv.org/abs/2010.15780v1
• Date: Thu, 29 Oct 2020 17:25:43 GMT
• Title: Storing short single-photon-level optical pulses in Bose-Einstein condensates for high-performance quantum memory
• Authors: Erhan Saglamyurek, Taras Hrushevskyi, Anindya Rastogi, Logan W. Cooke, Benjamin D. Smith, Lindsay J. LeBlanc
• Abstract summary: We implement the Autler-Townes-splitting (ATS) quantum-memory protocol on a Bose-Einstein condensate (BEC) platform. For 20 ns long-pulses, we achieve an ultra-low-noise memory with an efficiency of 30% and lifetime of 15 $mu$s.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Large-scale quantum networks require quantum memories featuring long-lived storage of non-classical light together with efficient, high-speed and reliable operation. The concurrent realization of these features is challenging due to inherent limitations of matter platforms and light-matter interaction protocols. Here, we propose an approach to overcome this obstacle, based on the implementation of the Autler-Townes-splitting (ATS) quantum-memory protocol on a Bose-Einstein condensate (BEC) platform. We demonstrate a proof-of-principle of this approach by storing short pulses of single-photon-level light as a collective spin-excitation in a rubidium BEC. For 20 ns long-pulses, we achieve an ultra-low-noise memory with an efficiency of 30% and lifetime of 15 $\mu$s. The non-adiabatic character of the ATS protocol (leading to high-speed and low-noise operation) in combination with the intrinsically large atomic densities and ultra-low temperatures of the BEC platform (offering highly efficient and long-lived storage) opens up a new avenue towards high-performance quantum memories.

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