Efficient optical quantum state engineering

Kevin T. McCusker, Paul G. Kwiat

Research output: Contribution to journalArticlepeer-review


We discuss a novel method of efficiently producing multiphoton states using repeated spontaneous parametric down-conversion. Specifically, by attempting down-conversion several times, we can pseudodeterministically add photons to a mode, producing various several-photon states, e.g., Fock states and N00N states (number-path entangled states of the form |NA,0B□+|0A,NB□). This scheme is exponentially more efficient than previous proposals; we discuss expected performance and experimental limitations.

Original languageEnglish (US)
Article number163602
JournalPhysical review letters
Issue number16
StatePublished - Oct 14 2009

ASJC Scopus subject areas

  • General Physics and Astronomy


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