Generation of Narrow-Band Hyperentangled Nondegenerate Paired Photons

Hui Yan, Shanchao Zhang, J. F. Chen, M. M. T. Loy, G. K. L. Wong, and Shengwang Du
Phys. Rev. Lett. 106, 033601 – Published 21 January 2011

Abstract

We report the generation of nondegenerate narrow-bandwidth paired photons with time-frequency and polarization entanglements from laser cooled atoms. We observe the two-photon interference caused by Rabi splitting with a coherence time of about 30 ns and a visibility of 81.8% which verifies the time-frequency entanglement of the paired photons. The polarization entanglement is confirmed by polarization correlation measurements which exhibit a visibility of 89.5% and characterized by quantum-state tomography with a fidelity of 90.8%. Taking into account the transmission losses and duty cycle, we estimate that the system generates hyperentangled paired photons into opposing single-mode fibers at a rate of 320 pairs per second.

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  • Received 4 November 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.033601

© 2011 American Physical Society

Authors & Affiliations

Hui Yan, Shanchao Zhang, J. F. Chen, M. M. T. Loy, G. K. L. Wong, and Shengwang Du*

  • Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China

  • *dusw@ust.hk

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Vol. 106, Iss. 3 — 21 January 2011

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