Two-photon interferences with degenerate and nondegenerate paired photons

Chang Liu; J. F. Chen; Shanchao Zhang; Shuyu Zhou; Yoon Ho Kim; M. M.T. Loy; G. K.L. Wong; Shengwang Du

doi:10.1103/PhysRevA.85.021803

Two-photon interferences with degenerate and nondegenerate paired photons

Chang Liu, J. F. Chen, Shanchao Zhang, Shuyu Zhou, Yoon Ho Kim, M. M.T. Loy, G. K.L. Wong, Shengwang Du

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

We generate narrow-band frequency-tunable entangled photon pairs from spontaneous four-wave mixing in three-level cold atoms and study their two-photon quantum interference after a beam splitter. We find that the path-exchange symmetry plays a more important role in the Hong-Ou-Mandel interference than the temporal or frequency indistinguishability, and observe coalescence interference for both degenerate and nondegenerate photons. We also observe a quantum beat in the same experimental setup using either slow or fast detectors.

Original language	English
Article number	021803
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	85
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.85.021803
State	Published - 13 Feb 2012
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.85.021803

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abstract = "We generate narrow-band frequency-tunable entangled photon pairs from spontaneous four-wave mixing in three-level cold atoms and study their two-photon quantum interference after a beam splitter. We find that the path-exchange symmetry plays a more important role in the Hong-Ou-Mandel interference than the temporal or frequency indistinguishability, and observe coalescence interference for both degenerate and nondegenerate photons. We also observe a quantum beat in the same experimental setup using either slow or fast detectors.",

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AU - Zhang, Shanchao

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AU - Kim, Yoon Ho

AU - Loy, M. M.T.

AU - Wong, G. K.L.

AU - Du, Shengwang

PY - 2012/2/13

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AB - We generate narrow-band frequency-tunable entangled photon pairs from spontaneous four-wave mixing in three-level cold atoms and study their two-photon quantum interference after a beam splitter. We find that the path-exchange symmetry plays a more important role in the Hong-Ou-Mandel interference than the temporal or frequency indistinguishability, and observe coalescence interference for both degenerate and nondegenerate photons. We also observe a quantum beat in the same experimental setup using either slow or fast detectors.

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Two-photon interferences with degenerate and nondegenerate paired photons

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