Delaying two-photon Fock states in hot cesium vapor using single photons generated on demand from a semiconductor quantum dot

H. Vural, S. Seyfferle, I. Gerhardt, M. Jetter, S. L. Portalupi, and P. Michler
Phys. Rev. B 103, 195304 – Published 5 May 2021

Abstract

Single photons from solid-state quantum emitters are playing a crucial role in the development of photonic quantum technologies and, by extension, higher order states, such as N-photon Fock states, allow for applications, e.g., in quantum-enhanced sensing. To verify the applicability of these states in future quantum technological implementations involving photon-atom interactions (i.e., storage of a quantum state in alkali vapor and photon delay) we utilize in the present study the dispersion of a hot cesium vapor at the D1 line to realize a temporal delay for two-photon Fock states as a result of the slow-light effect. Single photons are generated on demand from an InGaAs quantum dot, while their quantum interference at a beam splitter is used to generate a two-photon Fock state. We verify the successful propagation and the preservation of the two-photon Fock states after the interaction with the slow-light medium, while a significant temporal delay (five times the initial photon length) is achieved with a high vapor transmission of 90%.

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  • Received 7 October 2020
  • Revised 16 April 2021
  • Accepted 19 April 2021

DOI:https://doi.org/10.1103/PhysRevB.103.195304

©2021 American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

H. Vural1, S. Seyfferle1, I. Gerhardt2, M. Jetter1, S. L. Portalupi1, and P. Michler1,*

  • 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
  • 23. Physikalisches Institut and Center for Integrated Quantum Science and Technology, University of Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany

  • *p.michler@ihfg.uni-stuttgart.de

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Issue

Vol. 103, Iss. 19 — 15 May 2021

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