Elementary optical gate for expanding an entanglement web

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

Research output: Contribution to journalArticlepeer-review

77 Scopus citations


We introduce an elementary optical gate for expanding polarization entangled W states in which every pair of photons is entangled alike. The gate is composed of a pair of 50:50 beamsplitters and ancillary photons in the two-photon Fock state. By seeding one of the photons in an n -photon W state into this gate, we obtain an (n+2) -photon W state after postselection. This gate gives a better efficiency and a simpler implementation than previous proposals for W -state preparation.

Original languageEnglish (US)
Article number030302
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
StatePublished - Mar 25 2008

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Elementary optical gate for expanding an entanglement web'. Together they form a unique fingerprint.

Cite this