Nondestructive single-photon trigger

John C. Howell, John A. Yeazell

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


A triggering device sensitive to a single photon is discussed. It is based on a balanced quantum nondemolition (QND) measurement proposed by Chuang and Yamamoto [Phys. Rev. Lett. 76, 4281 (1996)]. The balanced measurement measures the total photon number and obtains no which-path/mode information. Hence, the timing of the photon can be determined without destroying its wave function or entangling the probe field. This could have extensive use in the realization of long-distance quantum communications systems.

Original languageAmerican English
Article number032311
Pages (from-to)1-3
Number of pages3
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
StatePublished - 2000
Externally publishedYes


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