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, Yoon Ho Kim

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Cold atom based narrowband entangled photon sources are important for efficient atom-photon interaction, which is at the heart of long-distance quantum communication and quantum memory protocols. Complete characterization of the narrowband entangled photons requires acquiring the frequency-time two-photon wavefunction, involving both joint temporal intensity (JTI) and joint temporal phase (JTP) measurements. Here, we demonstrate stimulated emission tomography of the frequency-time two-photon wavefunction of narrowband entangled photons from cold atoms. We show more than six orders of magnitude (×106) improvement in the measurement time for obtaining JTI and JTP compared to the conventional direct photon counting method, thus paving the way toward ultrafast high-resolution quantum tomography of photonic quantum states.

Original languageEnglish
Article number293457
Pages (from-to)1293-1297
Number of pages5
JournalOptica
Volume4
Issue number10
DOIs
Publication statusPublished - 2017 Oct 20

Bibliographical note

Publisher Copyright:
© 2017 Optical Society of America.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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