The influence of Ohmic noise on the dynamics of three-spin open quantum system

IF 1.2 4区 物理与天体物理 Q4 OPTICS
Muhammad Javed, Sidra Salim, Sumayya Said, Khushnood Shah, Atta ur Rahman
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Abstract

The dynamics of open quantum systems under decoherence effects remain a hotly debated topic in the case of the practical deployment of quantum information processing. In this regard, we examine how the three-qubit mixed state is affected by changes in the cut-off frequency of the Ohmic spectral density in a harmonic reservoir. Specifically, the degree of quantum memory-assisted entropic uncertainty (QMA-EU), along with the entanglement, coherence, and purity of the system, is to be demonstrated. A thorough exercise is done to investigate any underlying relationship between the three-qubit quantum characteristics. We show that a harmonic reservoir controlled by Ohmic noise prevails a monotonic-like decay in the current case where, sooner or later, the state becomes completely disentangled, decoherent, and mixed. The QMA-EU has always been found to have an increasing function causing the quantum resourcefulness to be reduced. Although, there is no pathway to avoid the Ohmic noise consequences and complete decay, however, we provided parameterization which would lead to prolonged preservation of quantum correlations with time. Finally, we provide various settings for the tuning of cut-off frequency regarding the Ohmic type bath and state parameters on the initial as well as final levels of quantum features.
欧姆噪声对三自旋开放量子系统动力学的影响
在量子信息处理的实际应用中,退相干效应下开放量子系统的动力学仍然是一个备受争议的话题。在这方面,我们研究了三量子比特混合态如何受到谐波水库中欧姆频谱密度截止频率变化的影响。具体来说,量子记忆辅助熵不确定性(QMA-EU)的程度,以及系统的纠缠性、相干性和纯度都将得到证明。我们进行了全面的练习,以研究三量子比特量子特性之间的任何潜在关系。我们表明,在当前情况下,由欧姆噪声控制的谐波贮存器会出现类似单调衰减的现象,在这种情况下,状态迟早会变得完全不纠缠、不相干和混合。QMA-EU 一直被认为具有递增函数,导致量子资源性降低。虽然没有避免欧姆噪声后果和完全衰减的途径,但我们提供了参数化,这将导致量子相关性随时间的延长而得到保留。最后,我们还就欧姆型浴和量子特征初始和最终水平的状态参数,提供了调整截止频率的各种设置。
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来源期刊
Laser Physics
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
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