Realization of Quantum Maxwell's Demon with Solid-State Spins
W.-B. Wang1 , X.-Y. Chang1 , F. Wang1 , P.-Y. Hou1 , Y.-Y. Huang1 , W.-G. Zhang1 , X.-L. Ouyang1 , X.-Z. Huang1 , Z.-Y. Zhang2 , H.-Y. Wang1 , L. He1 , L.-M. Duan1,2**
1 Center for Quantum Information, IIIS, Tsinghua University, Beijing 1000842 Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
Abstract ：We report experimental realization of a quantum version of Maxwell's demon using solid state spins where the information acquiring and feedback operations by the demon are achieved through conditional quantum gates. A unique feature of this implementation is that the demon can start in a quantum superposition state or in an entangled state with an ancilla observer. Through quantum state tomography, we measure the entropy in the system, demon, and the ancilla, showing the influence of coherence and entanglement on the result. A quantum implementation of Maxwell's demon adds more controllability to this paradoxical thermal machine and may find applications in quantum thermodynamics involving microscopic systems.
收稿日期: 2018-03-09
出版日期: 2018-03-17
:
03.67.-a
(Quantum information)
03.65.Ud
(Entanglement and quantum nonlocality)
03.65.Ta
(Foundations of quantum mechanics; measurement theory)
引用本文:
. [J]. 中国物理快报, 2018, 35(4): 40301-.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/35/4/040301
或
https://cpl.iphy.ac.cn/CN/Y2018/V35/I4/40301
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2018, Vol. 35 
