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在固有退相干情况下，与相干腔非线性相互作用的耦合双量子比特系统中的准概率信息。

Quasi-probability information in an coupled two-qubit system interacting non-linearly with a coherent cavity under intrinsic decoherence.

作者信息

Mohamed Abdel-Baset A, Eleuch Hichem

机构信息

Department of Mathematics, College of Science and Humanities in Al-Aflaj, Prince Sattam bin Abdulaziz University, Al-Aflaj, Saudi Arabia.

Department of Mathematics, Faculty of Science, Assiut University, Assiut, Egypt.

出版信息

Sci Rep. 2020 Aug 6;10(1):13240. doi: 10.1038/s41598-020-70209-5.

DOI:10.1038/s41598-020-70209-5
PMID:32764648
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7413403/
Abstract

We explore the phase space quantum effects, quantum coherence and non-classicality, for two coupled identical qubits with intrinsic decoherence. The two qubits are in a nonlinear interaction with a quantum field via an intensity-dependent coupling. We investigate the non-classicality via the Wigner functions. We also study the phase space information and the quantum coherence via the Q-function, Wehrl density, and Wehrl entropy. It is found that the robustness of the non-classicality for the superposition of coherent states, is highly sensitive to the coupling constants. The phase space quantum information and the matter-light quantum coherence can be controlled by the two-qubit coupling, initial cavity-field and the intrinsic decoherence.

摘要

我们研究了具有固有退相干的两个耦合相同量子比特的相空间量子效应、量子相干性和非经典性。这两个量子比特通过强度依赖耦合与量子场进行非线性相互作用。我们通过维格纳函数研究非经典性。我们还通过Q函数、韦尔密度和韦尔熵研究相空间信息和量子相干性。结果发现，相干态叠加的非经典性的稳健性对耦合常数高度敏感。相空间量子信息和物质-光量子相干性可以通过双量子比特耦合、初始腔场和固有退相干来控制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/3676cdc12d35/41598_2020_70209_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/3d1c597b8714/41598_2020_70209_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/4592843a2f29/41598_2020_70209_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/76bcd51f55b4/41598_2020_70209_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/eee005e56293/41598_2020_70209_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/d83f19fb3348/41598_2020_70209_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/3693909274fb/41598_2020_70209_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/7ceb143f2923/41598_2020_70209_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/3676cdc12d35/41598_2020_70209_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/3d1c597b8714/41598_2020_70209_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/4592843a2f29/41598_2020_70209_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/76bcd51f55b4/41598_2020_70209_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/eee005e56293/41598_2020_70209_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/d83f19fb3348/41598_2020_70209_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/3693909274fb/41598_2020_70209_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/7ceb143f2923/41598_2020_70209_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6db2/7413403/3676cdc12d35/41598_2020_70209_Fig8_HTML.jpg

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