Erasing quantum distinguishability via single-mode filtering

Monika Patel*, Joseph B. Altepeter, Yu Ping Huang, Neal N. Oza, Prem Kumar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Erasing quantum-mechanical distinguishability is of fundamental interest and also of practical importance, particularly in subject areas related to quantum information processing. We demonstrate a method applicable to optical systems in which single-mode filtering is used with only linear optical instruments to achieve quantum indistinguishability. Through "heralded" Hong-Ou-Mandel interference experiments we measure and quantify the improvement of indistinguishability between single photons generated via spontaneous four-wave mixing in optical fibers. The experimental results are in excellent agreement with predictions of a quantum-multimode theory we develop for such systems, without the need for any fitting parameter.

Original languageEnglish (US)
Article number033809
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
StatePublished - Sep 6 2012

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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