Optimizing the discrete time quantum walk using a SU(2) coin

dc.contributor.author	Chandrashekar, C.M.
dc.contributor.author	Srikanth, R.
dc.contributor.author	Laflamme, Raymond
dc.date.accessioned	2008-05-31T10:16:24Z
dc.date.available	2008-05-31T10:16:24Z
dc.date.issued	2008-03
dc.description	Open access
dc.description.abstract	We present a generalized version of the discrete time quantum walk, using the SU(2) operation as the quantum coin. By varying the coin parameters, the quantum walk can be optimized for maximum variance subject to the functional form sigma2[approximate]N2 and the probability distribution in the position space can be biased. We also discuss the variation in measurement entropy with the variation of the parameters in the SU(2) coin. Exploiting this we show how the quantum walk can be optimized for improving the mixing time in an n-cycle and for a quantum walk search.	en
dc.format.extent	139046 bytes
dc.format.mimetype	application/pdf
dc.identifier.citation	Physical Review A, 2008, Vol.77, 032326	en
dc.identifier.issn	1094-1622 (online)
dc.identifier.issn	1050-2947 (print)
dc.identifier.uri	http://hdl.handle.net/2289/3537
dc.language.iso	en	en
dc.publisher	American Physical Society	en
dc.relation.uri	http://dx.doi.org/10.1103/PhysRevA.77.032326	en
dc.relation.uri	http://arxiv.org/abs/0711.1882	en
dc.rights	2008 The American Physical Society	en
dc.title	Optimizing the discrete time quantum walk using a SU(2) coin	en
dc.type	Article	en

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