An elementary optical gate for expanding symmetrically shared entanglement

Toshiyuki Tashima, Sahin Ozdemir, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We introduce an elementary optical gate based on post-selection strategy that enables not only to prepare polarization entangled W state, but also to grow this into a large-scale multi-photon W state. The gate is composed of a pair of 50:50 beamsplitters and a phase shifter, and it requires a two-photon ancillary state. When the input is a photon from an n-photon W state, the gate produces an (n∈+∈2)-photon W state for post-selected events. Moreover, we show that this gate can be used to prepare and expand GHZ states by a simple modification of the ancillary state.

Original languageEnglish (US)
Title of host publicationTheory of Quantum Computation, Communication, and Cryptography - Third Workshop, TQC 2008, Revised Selected Papers
Pages70-82
Number of pages13
DOIs
StatePublished - Dec 1 2008
Event3rd Workshop on Theory of Quantum Computation, Communication, and Cryptography, TQC 2008 - Tokyo, Japan
Duration: Jan 30 2008Feb 1 2008

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume5106 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Other

Other3rd Workshop on Theory of Quantum Computation, Communication, and Cryptography, TQC 2008
CountryJapan
CityTokyo
Period1/30/082/1/08

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Computer Science(all)

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