用单个可观测量见证量子姆潘巴效应
Witnessing the Quantum Mpemba Effect with a Single Observable
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中文总结 AI 辅助
研究基于单个可观测量为马尔可夫开放量子系统引入通用框架见证量子姆潘巴效应,姆潘巴可观测量绕过全态层析成像,以局部磁化为例说明方法并应用于广义振幅阻尼下量子比特,为态制备和热任务优化提供实用价值。
中文摘要 AI 辅助
姆潘巴效应是指一个远离平衡态的系统比更接近平衡态的系统弛豫得更快,这违背了非平衡统计力学的直觉。在此,我们基于为马尔可夫开放量子系统定义的单个可观测量,引入了一个明确见证此现象的通用框架。姆潘巴可观测量绕过了全态层析成像,为态制备和热任务优化提供了实用价值。我们以局部磁化作为姆潘巴特征来说明我们的方法,并将其应用于广义振幅阻尼下的量子比特。
英文摘要
The Mpemba effect, in which a system farther from equilibrium relaxes faster than one closer to it, defies the intuition of nonequilibrium statistical mechanics. Here, we introduce a general framework to unambiguously witness this phenomenon based on a single observable defined for Markovian open quantum systems. The Mpemba observable bypasses full state tomography, offering utility for state preparation and thermal task optimization. We illustrate our method using local magnetization as a Mpemba signature, applying it to a qubit under generalized amplitude damping.