Local expansion of photonic W state using a polarization-dependent beamsplitter

Toshiyuki Tashima; Şahin Kaya Özdemir; Takashi Yamamoto; Masato Koashi; Nobuyuki Imoto

doi:10.1088/1367-2630/11/2/023024

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Local expansion of photonic W state using a polarization-dependent beamsplitter

Toshiyuki Tashima, Şahin Kaya Özdemir, Takashi Yamamoto, Masato Koashi and Nobuyuki Imoto

Published 11 February 2009 • Published under licence by IOP Publishing Ltd
New Journal of Physics, Volume 11, February 2009Citation Toshiyuki Tashima et al 2009 New J. Phys. 11 023024DOI 10.1088/1367-2630/11/2/023024

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Toshiyuki Tashima

AFFILIATIONS

Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

CREST Photonic Quantum Information Project, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012, Japan

Şahin Kaya Özdemir

AFFILIATIONS

Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

CREST Photonic Quantum Information Project, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012, Japan

ERATO Nuclear Spin Electronics Project, Aramaki, Aza Aoba, Sendai 980-0845, Japan

Department of Electrical and Systems Engineering, Washington University in St Louis, St Louis, MO 63130, USA

Takashi Yamamoto

AFFILIATIONS

Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

CREST Photonic Quantum Information Project, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012, Japan

Masato Koashi

AFFILIATIONS

Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

CREST Photonic Quantum Information Project, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012, Japan

Nobuyuki Imoto

AFFILIATIONS

Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

CREST Photonic Quantum Information Project, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012, Japan

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Toshiyuki Tashima

AFFILIATIONS

Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

CREST Photonic Quantum Information Project, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012, Japan

Şahin Kaya Özdemir

AFFILIATIONS

Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

CREST Photonic Quantum Information Project, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012, Japan

ERATO Nuclear Spin Electronics Project, Aramaki, Aza Aoba, Sendai 980-0845, Japan

Department of Electrical and Systems Engineering, Washington University in St Louis, St Louis, MO 63130, USA

Takashi Yamamoto

AFFILIATIONS

Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

CREST Photonic Quantum Information Project, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012, Japan

Masato Koashi

AFFILIATIONS

Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

CREST Photonic Quantum Information Project, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012, Japan

Nobuyuki Imoto

AFFILIATIONS

Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan

CREST Photonic Quantum Information Project, 4-1-8 Honmachi, Kawaguchi, Saitama 331-0012, Japan

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Dates

Received 17 October 2008
Published 11 February 2009

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1367-2630/11/2/023024

Abstract

We propose a simple probabilistic optical gate to expand polarization entangled W states. The gate uses one polarization-dependent beamsplitter and a horizontally polarized single photon as an ancilla. The gate post-selectively expands N-photon W states to (N+1)-photon W states. A feasibility analysis considering the realistic experimental conditions shows that the scheme is within the reach of the current quantum optical technologies.

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