利用非厄米运算提高量子密集编码的容量

IF 1.2 4区物理与天体物理 Q4 OPTICS

Laser Physics Pub Date : 2023-11-07 DOI:10.1088/1555-6611/ad06a1

Yang Leng, Fei Chen

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引用次数: 1

摘要

摘要提出了一种利用非厄米运算增强振幅阻尼噪声下量子密集编码容量的新方法。在非厄米运算的帮助下，我们证明了量子密集编码的容量总是大于1的任何两个量子位态。特别是在退相干强度强的情况下，非厄米运算比退相干强度小的情况下能更有效地提高量子密集编码。我们的研究结果为量子环境中量子密集编码的保护提供了新的思路。

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Improving the capacity of quantum dense coding via non-Hermitian operation

Abstract We propose a novel method to enhance the capacity of quantum dense coding under amplitude damping noise using non-Hermitian operations. With the assistance of non-Hermitian operations, we show that the capacity of quantum dense coding can always be larger than 1 for any two-qubit states. In particular, the non-Hermitian operation can improve quantum dense coding more efficiently in the case of strong decoherence strength than those with small decoherence strength. Our results shed new light on the protection of quantum dense coding in a quantum environment.

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来源期刊

Laser Physics 物理-光学

CiteScore

2.60

自引率

8.30%

发文量

127

审稿时长

2.2 months

期刊介绍： Laser Physics offers a comprehensive view of theoretical and experimental laser research and applications. Articles cover every aspect of modern laser physics and quantum electronics, emphasizing physical effects in various media (solid, gaseous, liquid) leading to the generation of laser radiation; peculiarities of propagation of laser radiation; problems involving impact of laser radiation on various substances and the emerging physical effects, including coherent ones; the applied use of lasers and laser spectroscopy; the processing and storage of information; and more. The full list of subject areas covered is as follows: -physics of lasers- fibre optics and fibre lasers- quantum optics and quantum information science- ultrafast optics and strong-field physics- nonlinear optics- physics of cold trapped atoms- laser methods in chemistry, biology, medicine and ecology- laser spectroscopy- novel laser materials and lasers- optics of nanomaterials- interaction of laser radiation with matter- laser interaction with solids- photonics