Four-photon quantum interferometry at a telecom wavelength

Masahiro Yabuno, Ryosuke Shimizu, Yasuyoshi Mitsumori, Hideo Kosaka, Keiichi Edamatsu

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


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.

Original languageEnglish
Article number010302
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number1
Publication statusPublished - 2012 Jul 5


Dive into the research topics of 'Four-photon quantum interferometry at a telecom wavelength'. Together they form a unique fingerprint.

Cite this