Demon-like algorithmic quantum cooling and its realization with quantum optics
Demon-like algorithmic quantum cooling and its realization with quantum optics
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恶魔般的算法量子冷却及其量子光学实现
DOI：
10.1038/nphoton.2013.354
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发表时间：
2014-02-01
期刊：
影响因子：
35
通讯作者：
Guo, Guang-Can
中科院分区：
文献类型：
--
作者：
Xu, Jin-Shi;Yung, Man-Hong;Guo, Guang-Can
多体系统低温特性的模拟仍然是理论和实验量子信息科学的主要挑战之一。我们提出并通过实验证明了一种通用（伪）冷却方法，适用于任何可以由量子计算机模拟的物理系统。这种方法使我们能够提取和消除量子态的热成分，如量子麦克斯韦妖。实验实现采用量子光网络实现，结果与理论预测完全一致（保真度高于0.978）。所提出的伪冷却方法的应用包括模拟经典方法难以处理的物理和化学系统的低温特性。
Simulation of the low-temperature properties of many-body systems remains one of the major challenges in theoretical,,and experimental,,quantum information science. We present, and demonstrate experimentally, a universal (pseudo) cooling method that is applicable to any physical system that can be simulated by a quantum computer,,. This method allows us to distil and eliminate hot components of quantum states like a quantum Maxwell's demon,. The experimental implementation is realized with a quantum optical network, and the results are in full agreement with theoretical predictions (with fidelity higher than 0.978). Applications of the proposed pseudo-cooling method include simulations of the low-temperature properties of physical and chemical systems that are intractable with classical methods.