Generation of entanglement between a highly wave-packet-tunable photon
and a spin-wave memory in cold atoms
- URL: http://arxiv.org/abs/2111.00387v1
- Date: Sun, 31 Oct 2021 02:49:24 GMT
- Title: Generation of entanglement between a highly wave-packet-tunable photon
and a spin-wave memory in cold atoms
- Authors: Ya Li, Yafei Wen, Shengzhi Wang, Chao Liu, Hailong Liu, Minjie Wang,
Can Sun, Yan Gao, Shujing Li, and Hai Wang
- Abstract summary: We demonstrate control of waveform length of the photon entangled with an atomic memory.
Bell parameter S as a function of the duration of photon pulse is measured.
We confirm that the increase in photon noise probability per pulse with the pulse-duration is responsible for the S decrease.
- Score: 14.228823912825142
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Controls of waveforms (pulse durations) of single photons are important tasks
for effectively interconnecting disparate atomic memories in hybrid quantum
networks. So far, the waveform control of single photon that is entangled with
an atomic memory remains unexplored. Here, we demonstrated control of waveform
length of the photon that is entangled with an atomic spin-wave memory by
varying light-atom interaction time in cold atoms. The Bell parameter S as a
function of the duration of photon pulse is measured, which shows that
violations of Bell equality can be achieved for the photon pulse in the
duration range from 40 ns to 50 us, where, S=2.64+/-0.02 and S=2.26+/-0.05 for
the 40-ns and 50-{\mu}s durations, respectively. The measured results show that
S parameter decreases with the increase in the pulse duration. We confirm that
the increase in photon noise probability per pulse with the pulse-duration is
responsible for the S decrease.
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