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Title: Discrete-time quantum walk approach to state transfer
Authors: Kurzyński, P. 
Wójcik, A.
Issue Date: 13-Jun-2011
Citation: Kurzyński, P., Wójcik, A. (2011-06-13). Discrete-time quantum walk approach to state transfer. Physical Review A - Atomic, Molecular, and Optical Physics 83 (6) : -. ScholarBank@NUS Repository.
Abstract: We show that a quantum-state transfer, previously studied as a continuous-time process in networks of interacting spins, can be achieved within the model of discrete-time quantum walks with a position-dependent coin. We argue that, due to additional degrees of freedom, discrete-time quantum walks allow one to observe effects which cannot be observed in the corresponding continuous-time case. First, we study a discrete-time version of the engineered coupling protocol due to Christandl and then we discuss the general idea of conversion between continuous-time quantum walks and discrete-time quantum walks. © 2011 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.83.062315
Appears in Collections:Staff Publications

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