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arXiv 2405.06960quant-phcond-mat.stat-mech
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突然淬火下受控量子相干性与魔法资源的动力学

Dynamics of Steered Quantum Coherence and Magic Resource under Sudden Quench

Buein Zahra Technical University(布因扎赫拉理工大学);Ruhr-Universität Bochum(波鸿鲁尔大学);Beijing Institute of Mathematical Sciences and Applications (BIMSA)(北京数学科学应用研究所);Institute for Advanced Studies in Basic Sciences (IASBS)(基础科学高等研究院);Institute for Research in Fundamental Sciences (IPM)(基本科学研究院);University of Gothenburg(哥德堡大学)

Saeid Ansari, Alireza Akbari, R. Jafari

AI总结:

本文研究一维XY自旋链在含时横向磁场下SQC、SQRE与魔法资源的淬火动力学,揭示其对初始相的依赖及临界点处的有限尺寸线性标度规律。

摘要:

我们研究了在含时横向磁场存在的情况下,一维XY自旋链中受控量子相干性(SQC)的l_1范数、受控量子相对熵(SQRE)以及魔法资源量化器(QRM)的动力学。我们发现系统的响应对初始态和磁场强度高度敏感。我们表明,SQC、SQRE和MRQ的动力学揭示了与系统平衡量子相变(QPT)相关的临界点。当初始态制备在铁磁相时,所有量在QPT处均表现出最大值。相反,如果系统的初始态是顺磁相,它们会在量子临界点处发生突变。此外,我们的结果证实,当淬火至量子临界点时,首次抑制(复苏)时间与系统尺寸呈线性标度关系,而且显著的是,无论系统的初始相如何,其标度比率在所有淬火中均保持一致。这些结果突显了量子信息资源与远离平衡的量子系统动力学之间的相互作用。此类洞见对于量子信息处理以及理解量子多体系统中的非平衡现象可能至关重要。

英文摘要:

We explore the dynamics of l_1-norm of steered quantum coherence (SQC), steered quantum relative entropy (SQRE), and magic resource quantifier (QRM) in the one-dimensional XY spin chain in the presence of time dependent transverse magnetic field. We find that the system's response is highly sensitive to the initial state and magnetic field strength. % We show that the dynamics of SQC, SQRE and MRQ revealing the critical point associated with equilibrium quantum phase transition (QPT) of the system. All quantities show maximum at QPT when the initial state is prepared in the ferromagnetic phase. Conversely, they undergo abrupt changes at quantum critical point if the initial state of the system is paramagnetic. Moreover, our results confirm that, when quench is done to the quantum critical point, the first suppression (revival) time scales linearly with the system size, and remarkably, its scaling ratio remains consistent for all quenches, irrespective of the initial phase of the system. % These results highlight the interplay between the quantum information resources and dynamics of quantum systems away from the equilibrium. Such insights could be vital for quantum information processing and understanding non-equilibrium phenomena in quantum many-body systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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