Optical and atomic decoherence in entangled atomic ensembles generated
by quantum nondemolition measurements
- URL: http://arxiv.org/abs/2302.13062v1
- Date: Sat, 25 Feb 2023 11:16:22 GMT
- Title: Optical and atomic decoherence in entangled atomic ensembles generated
by quantum nondemolition measurements
- Authors: Shuai Gao, Shuang Li, Manish Chaudhary, Matthew Prest, Ebubechukwu O.
Ilo-Okeke, Valentin Ivannikov, and Tim Byrnes
- Abstract summary: We study the effects of decoherence in the form of optical phase diffusion, photon loss and gain, and atomic dephasing in entangled atomic ensembles.
For the optical decoherence channels, we use the technique of integration within ordered operators (IWOP) to obtain the Kraus operators that describe the decoherence.
- Score: 5.301892337432412
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We study the effects of decoherence in the form of optical phase diffusion,
photon loss and gain, and atomic dephasing in entangled atomic ensembles
produced via quantum nondemolition (QND) measurements. For the optical
decoherence channels, we use the technique of integration within ordered
operators (IWOP) to obtain the Kraus operators that describe the decoherence.
We analyze the effect of different decoherence channels on a variety of
quantities such as the variances of the spin operators, entanglement and
correlation criteria, logarithmic negativity, and the Bell-CHSH inequality. We
generally find a smooth decay of correlations and entanglement in the presence
of decoherence. We find that various quantities retain showing non-classical
properties under all three types of decoherence, in the short interaction time
range. Our results show that such QND measurements are one of the most
promising methods for entanglement generation between two Bose-Einstein
condensates.
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