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Title: Experimental cyclic interconversion between coherence and quantum correlations
Authors: Wu, Kang-Da
Hou, Zhibo
Zhao, Yuan-Yuan
Xiang, Guo-Yong
Li, Chuan-Feng
Guo, Guang-Can
Ma, Jiajun
He, Qiong-Yi
Thompson, Jayne
Gu, Mile
Keywords: Optical Tests Of Quantum Theory
Quantum Correlations In Quantum Information
Issue Date: 2018
Source: Wu, K.-D., Hou, Z., Zhao, Y.-Y., Xiang, G.-Y., Li, C.-F., Guo, G.-C., . . . Gu, M. (2018). Experimental Cyclic Interconversion between Coherence and Quantum Correlations. Physical Review Letters, 121(5), 050401-. doi:10.1103/PhysRevLett.121.050401
Series/Report no.: Physical Review Letters
Abstract: Quantum resource theories seek to quantify sources of nonclassicality that bestow quantum technologies their operational advantage. Chief among these are studies of quantum correlations and quantum coherence. The former isolates nonclassicality in the correlations between systems, and the latter captures nonclassicality of quantum superpositions within a single physical system. Here, we present a scheme that cyclically interconverts between these resources without loss. The first stage converts coherence present in an input system into correlations with an ancilla. The second stage harnesses these correlations to restore coherence on the input system by measurement of the ancilla. We experimentally demonstrate this interconversion process using linear optics. Our experiment highlights the connection between nonclassicality of correlations and nonclassicality within local quantum systems and provides potential flexibilities in exploiting one resource to perform tasks normally associated with the other.
ISSN: 0031-9007
Rights: © 2018 American Physical Society. This paper was published in Physical Review Letters and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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