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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** |
1Center for Quantum Information, IIIS, Tsinghua University, Beijing 100084
2Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
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| Cite this article: |
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W.-B. Wang, X.-Y. Chang, F. Wang et al 2018 Chin. Phys. Lett. 35 040301 |
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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.
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Received: 09 March 2018
Published: 17 March 2018
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| PACS: |
03.67.-a
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(Quantum information)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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03.65.Ta
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(Foundations of quantum mechanics; measurement theory)
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| Fund: Supported by the Ministry of Education of China, and the National Key Research and Development Program of China under Grant No 2016YFA0301902. |
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