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Phys. Rev. A 60, R37 - R40 (1999)

Quantum interference by two temporally distinguishable pulses

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Yoon-Ho Kim, Maria V. Chekhova *, Sergei P. Kulik *, and Yanhua Shih
Department of Physics, University of Maryland, Baltimore County, Baltimore, Maryland 21250

Rapid Communication Received 22 February 1999

We report a two-photon interference effect, in which the entangled photon pairs are generated from two laser pulses well separated in time. In a single pump pulse case, interference effects did not occur in our experimental scheme. However, by introducing a second pump pulse delayed in time, quantum interference was then observed. The visibility of the interference fringes shows a dependence on the delay time between two laser pulses. The results are explained in terms of indistinguishability of biphoton amplitudes that originates from two temporally separated laser pulses.


©1999 The American Physical Society

URL: http://link.aps.org/abstract/PRA/v60/pR37
DOI: 10.1103/PhysRevA.60.R37
PACS: 42.50.Dv, 03.65.Bz

* Permanent address: Department of Physics, Moscow State University, Moscow, Russia.

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