Abstract

We report the Hong–Ou–Mandel (HOM) interference, with visibility of 91%, produced from two independent single photons retrieved from collective atomic excitations in two separate cold-atom clouds with high optical depths of 90. The high visibility of the HOM dip is ascribed to the pure single photon in the Fock state that was generated from a dense-cold-atom cloud pumping by a short pulse. The visibility is always the same regardless of the time response of the single-photon detectors. This result experimentally shows that the single photons retrieved are in a separable temporal state with their idler photons.

© 2016 Chinese Laser Press

Quantum interference between autonomous single-photon sources from Doppler-broadened atomic ensembles

Taek Jeong, Yoon-Seok Lee, Jiho Park, Heonoh Kim, and Han Seb Moon
Optica 4(10) 1167-1170 (2017)

Two-photon excitation of launched cold atoms in flight

Rene Gonzalez, Eduardo Alejandro, Emma Erwin, and Anne L. Goodsell
J. Opt. Soc. Am. B 34(6) 1090-1096 (2017)

Measuring the frequency-time two-photon wavefunction of narrowband entangled photons from cold atoms via stimulated emission

Kwang-Kyoon Park, Jin-Hun Kim, Tian-Ming Zhao, Young-Wook Cho, and Yoon-Ho Kim
Optica 4(10) 1293-1297 (2017)

Efficient generation of hyperentangled photon pairs with controllable waveforms from cold atoms

Hui Yan and Shi-liang Zhu
J. Opt. Soc. Am. B 30(2) 362-365 (2013)

Non-iterative imaging of inhomogeneous cold atom clouds using phase retrieval from a single diffraction measurement

D. V. Sheludko, A. J. McCulloch, M. Jasperse, H. M. Quiney, and R. E. Scholten
Opt. Express 18(2) 1586-1599 (2010)