Implementation of a spatial two-dimensional quantum random walk with tunable decoherence

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F12%3A33142140" target="_blank" >RIV/61989592:15310/12:33142140 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1103/PhysRevA.86.052327" target="_blank" >http://dx.doi.org/10.1103/PhysRevA.86.052327</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevA.86.052327" target="_blank" >10.1103/PhysRevA.86.052327</a>

Result language

angličtina

Original language name

Implementation of a spatial two-dimensional quantum random walk with tunable decoherence

Original language description

We put forward a versatile and highly scalable experimental setup for the realization of discrete two-dimensional quantum random walks with a single-qubit coin and tunable degree of decoherence. The proposed scheme makes use of a small number of simple optical components arranged in a multipath Mach-Zehnder-like configuration, where a weak coherent state is injected. Environmental effects (decoherence) are generated by a spatial light modulator, which introduces pure dephasing in the transverse spatialplane perpendicular to the direction of propagation of the light beam. By controlling the characteristics of this dephasing, one can explore a great variety of scenarios of quantum random walks: pure quantum evolution (ballistic spread), fast fluctuatingenvironment leading to a diffusive classical random walk, and static disorder resulting in the observation of Anderson localization.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BH - Optics, masers and lasers

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review A

ISSN

1050-2947

e-ISSN

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Volume of the periodical

86

Issue of the periodical within the volume

5

Country of publishing house

US - UNITED STATES

Number of pages

6

Pages from-to

"052327-1"-"052327-6"

UT code for WoS article

000311542200009

EID of the result in the Scopus database

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