منابع مشابه
Quantum Walks driven by many coins
Abstract Quantum random walks have been much studied recently, largely due to their highly nonclassical behavior. In this paper, we study one possible route to classical behavior for the discrete quantum random walk on the line: the use of multiple quantum “coins” in order to diminish the effects of interference between paths. We find solutions to this system in terms of the single coin random ...
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Abstract The quantum random walk has been much studied recently, largely due to its highly nonclassical behavior. In this paper, we study one possible route to classical behavior for the discrete quantum walk on the line: the presence of decoherence in the quantum “coin” which drives the walk. We find exact analytical expressions for the time dependence of the first two moments of position, and...
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We introduce the concept of a driven quantum walk. This work is motivated by recent theoretical and experimental progress that combines quantum walks and parametric down-conversion, leading to fundamentally different phenomena. We compare these striking differences by relating the driven quantum walks to the original quantum walk. Next, we illustrate typical dynamics of such systems and show th...
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We present many-particle quantum walks on graphs. This study brings together the concepts of many-particles, multimode and indistinguishability to discrete quantum walks. Our scheme is independent of the topology of the graphs: linear, planar or spatial. We use the concepts of position field operators, adjacency matrix and the results of group theory to construct many particle systems on graphs...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2003
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.67.052317