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Four-photon quantum interferometry at a telecom wavelength

Masahiro Yabuno, Ryosuke Shimizu, Yasuyoshi Mitsumori, Hideo Kosaka, and Keiichi Edamatsu
Phys. Rev. A 86, 010302(R) – Published 5 July 2012

Abstract

We report on an experimental demonstration of four-photon quantum interference using telecom-wavelength photons. The realization of multiphoton quantum interference is essential to linear optics quantum information processing and measurement-based quantum computing. We have developed a source that efficiently emits photon pairs in a pure spectrotemporal mode at a telecom-wavelength region, and have demonstrated quantum interference exhibiting reduced fringe intervals that correspond to a reduced de Broglie wavelength of up to the four-photon NOON state. Our result should open a path to practical quantum information processing using telecom-wavelength photons.

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  • Received 12 December 2011

DOI:https://doi.org/10.1103/PhysRevA.86.010302

©2012 American Physical Society

Authors & Affiliations

Masahiro Yabuno1,*, Ryosuke Shimizu2, Yasuyoshi Mitsumori1, Hideo Kosaka1, and Keiichi Edamatsu1

  • 1Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
  • 2Center for Frontier Science and Engineering, University of Electro-Communications, Tokyo 182-8585, Japan

  • *yabuno@quantum.riec.tohoku.ac.jp

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Vol. 86, Iss. 1 — July 2012

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