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Role of interference in quantum state transfer through spin chains

Lyakhov, A. O. and Braun, D. and Bruder, C.. (2007) Role of interference in quantum state transfer through spin chains. Physical review A, General physics, Vol. 76, H. 2 , 022321, 7 S..

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Official URL: http://edoc.unibas.ch/dok/A5252820

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Abstract

We examine the role that interference plays in quantum state transfer through several types of finite spin chains, including chains with isotropic Heisenberg interaction between nearest neighbors, chains with reduced coupling constants to the spins at the end of the chain, and chains with anisotropic coupling constants. We evaluate quantitatively both the interference corresponding to the propagation of the entire chain and the interference in the effective propagation of the first and last spins only, treating the rest of the chain as a black box. We show that perfect quantum state transfer is possible without quantum interference and provide evidence that the spin chains examined realize interference-free quantum state transfer to a good approximation.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Bruder, Christoph
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:1050-2947
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:49

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