Room Temperature Atomic Frequency Comb Memory for Light
(2020)
Demonstration of an Atomic Frequency Comb Quantum Memory using Velocity-Selective Pumping in Warm Alkali Vapour
Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS 2020-May (2020)
Abstract:
We present the first demonstration of velocity-selective pumping in an atomic vapour to preserve light-matter coherence. Control is illustrated by a subsequent demonstration of an atomic frequency comb quantum memory realised in the vapour.Raman quantum memory with built-in suppression of four-wave-mixing noise
Physical Review A American Physical Society 100:3 (2019) 033801
Abstract:
Quantum memories are essential for large-scale quantum information networks. Along with high efficiency, storage lifetime, and optical bandwidth, it is critical that the memory adds negligible noise to the recalled signal. A common source of noise in optical quantum memories is spontaneous four-wave mixing. We develop and implement a technically simple scheme to suppress this noise mechanism by means of quantum interference. Using this scheme with a Raman memory in warm atomic vapor, we demonstrate over an order of magnitude improvement in noise performance. Furthermore we demonstrate a method to quantify the remaining noise contributions and present a route to enable further noise suppression. Our scheme opens the way to quantum demonstrations using a broadband memory, significantly advancing the search for scalable quantum photonic networks.Raman Quantum Memory with Built-In Suppression of Four-wave Mixing Noise
(2019)
Noise suppression via atomic absorption in a Raman quantum memory
Quantum Information and Measurement (QIM) V: Quantum Technologies, OSA Technical Digest (Optical Society of America, 2019) OSA Publishing (2019)