Non-deterministic approximation of photon number discriminating detectors using non-discriminating detectors

Peter P. Rohde*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


We present a scheme for non-deterministically approximating photon number resolving detectors using non-discriminating detectors. The model is simple in construction and employs very few physical resources. Despite its non-determinism, the proposal may nonetheless be suitable for use in some quantum optics experiments in which non-determinism can be tolerated. We analyse the detection scheme in the context of an optical implementation of the controlled-NOT gate, an inherently non-deterministic device. This allows the gate's success probability to be traded away for improved gate fidelity, assuming high efficiency detectors. The scheme is compared to two other proposals, both deterministic, for approximating discriminating detectors using non-discriminating detectors: the cascade and time division multiplexing schemes.

Original languageEnglish
Pages (from-to)82-86
Number of pages5
JournalJournal of Optics B: Quantum and Semiclassical Optics
Issue number2
Publication statusPublished - Feb 2005


  • Linear optics quantum computing
  • Photo-detection
  • Photon detection

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