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Displaced rotations of coherent states

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dc.contributor.author Podoshvedov S.A. en
dc.date.accessioned 2018-10-15T11:17:14Z
dc.date.available 2018-10-15T11:17:14Z
dc.date.issued 2012
dc.identifier.issn 15700755
dc.identifier.uri http://dspace.susu.ru/handle/0001.74/19967
dc.description.abstract We propose an approach with displaced states that can be used for rotations of coherent states.Our approach is based on representation of arbitrary one-mode pure state in free-travelling fields, in particular superposition of coherent states (SCSs), in terms of displaced number states with arbitrary amplitude of displacement. Optical scheme is developed for construction of displacing Hadamard gate for the coherent states. It is based on alternation of single photon additions and displacement operators (in general case, N-singe photon additions and N-1-displacements are required) with seed coherent state to generate both even and odd displaced squeezed SCSs regardless of number of used photon additions. The optical scheme is sensitive to the seed coherent state provided that other parameters of the scheme are invariable. Output states approximate with high fidelity either even squeezed SCS or odd SCS shifted relative each other by some value. It enables to construct local rotations for coherent states, in particular, Hadamard gate being mainframe element for quantum computation with coherent states. The effects deteriorating quality of output states are considered. © Springer Science+Business Media, LLC 2011. en]
dc.language.iso English
dc.relation.ispartof Quantum Information Processing en]
dc.subject Coherent state en]
dc.subject Displaced number state en]
dc.subject Displacement operators en]
dc.subject Hadamard gate en]
dc.subject Optical scheme en]
dc.subject Pure state en]
dc.subject Single photons en]
dc.subject Quantum computers en]
dc.subject Photons en]
dc.title Displaced rotations of coherent states en
dc.type Article en]
dc.identifier.doi 10.1007/s11128-011-0338-7
dc.identifier.scopus https://www.scopus.com/inward/record.uri?eid=2-s2.0-84870456449&doi=10.1007%2fs11128-011-0338-7&partnerID=40&md5=6869aa9053be4c711ba089e694cade09

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