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Title: Generation of narrow-band hyperentangled nondegenerate paired photons
Authors: Yan, Hui
Zhang, Shanchao
Chen, Jiefei
Loy, Michael M.
Wong, George K. L.
Du, Shengwang
Keywords: Nondegenerate narrow-bandwidth paired photons
Two-photon interference
Rabi splitting
Polarization entanglements
Quantum-state tomography
Hyperentangled paired photons
Single-mode fibers
Issue Date: 21-Jan-2011
Citation: Physical review letters, v. 106, 033601 (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.
Rights: Physical Review Letters © copyright (2011) American Physical Society. The Journal's web site is located at
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