Journal
ANNALS OF PHYSICS
Volume 351, Issue -, Pages 739-750Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.aop.2014.10.001
Keywords
Quantum state transfer; Quantum recovering measurement; Multispin states
Categories
Funding
- National Natural Science Foundation of China [11204156, 61178012, 11304179]
- Scientific Research Foundation for Outstanding Young Scientists of Shandong Province [BS2013DX034]
- Vietnam National Foundation for Science and Technology Development (NAFOSTED) [103.01-2014.02]
- IT R&D program of MOTIE/KEIT [10043464]
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In combination with the theories of open system and quantum recovering measurement, we propose a quantum state transfer scheme using spin chains by performing two sequential operations: a projective measurement on the spins of 'environment' followed by suitably designed quantum recovering measurements on the spins of interest. The scheme allows perfect transfer of arbitrary multispin states through multiple parallel spin chains with finite probability. Our scheme is universal in the sense that it is state-independent and applicable to any model possessing spin spin interactions. We also present possible methods to implement the required measurements taking into account the current experimental technologies. As applications, we consider two typical models for which the probabilities of perfect state transfer are found to be reasonably high at optimally chosen moments during the time evolution. (C) 2014 Elsevier Inc. All rights reserved.
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