An experimental setup to generate narrowband bi-photons via four-wave mixing in cold atoms

Authors

  • N. Arias-Tellez Instituto de Física, UNAM
  • I. F. Angeles-Aguillón Instituto de Física, UNAM
  • D. Martínez-Cara Instituto de Física, UNAM
  • A. Martínez-Vallejo Instituto de Física, UNAM
  • L. Y. Villegas Aguilar Instituto de Física, UNAM
  • L. A. Mendoza-López Instituto de Física, UNAM
  • Y. M. Torres Instituto de Física, UNAM
  • R. A. Gutiérrez-Arenas Instituto de Física, UNAM
  • R. Jáuregui Instituto de Física, UNAM
  • I. Pérez-Castillo UAM-Iztapalapa
  • A. Ceré Center for Quantum Technologies
  • Daniel Sahagún Sánchez Instituto de Física, U. N. A. M.

DOI:

https://doi.org/10.31349/RevMexFis.68.031303

Keywords:

cold atoms, bi-photons, quantum optics, complete quantum systems, four-wave mixing

Abstract

We present our recently-built experimental setup designed to generate near-infrared and narrow-band correlated photon pairs by inducingfour-wave mixing in a cold gas of 87Rb atoms confined in a magneto-optical trap. The experimental setup and its automation and control approach are described in detail. A characterization of the optical density of the atomic ensemble as well as the basic statistical measurements of the generated light are reported. The non-classical nature of the photons pairs is confirmed by observing a violation of Cauchy-Schwarz inequality by a factor of 5.6 × 10 in a Hanbury Brown – Twiss interferometer. A 1/e coherence time for the heralded, idler photons of 4.4 ± 0.1 ns is estimated from our observations. We are able to achieve a value of 10s−1pair-detection-rate, which results in a spectral brightness of 280 (MHz s)−1. The combination of high brightness and narrow-band spectrum makes this photon-pair source a viable tool in fundamental studies of quantum states and opens the door to use them in quantum technologies.

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Published

2022-05-01

How to Cite

Arias-Tellez, N., I. F. Angeles-Aguillón, D. Martínez-Cara, A. Martínez-Vallejo, L. Y. Villegas Aguilar, L. A. Mendoza-López, Y. M. Torres, R. A. Gutiérrez-Arenas, R. Jáuregui, I. Pérez-Castillo, A. Ceré, and Daniel Sahagún Sánchez. 2022. “An Experimental Setup to Generate Narrowband Bi-Photons via Four-Wave Mixing in Cold Atoms”. Revista Mexicana De Física 68 (3 May-Jun):031303 1-0. https://doi.org/10.31349/RevMexFis.68.031303.