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  • Letter

Deterministic single-photon source in the ultrastrong-coupling regime

Jie Peng1,*, Jianing Tang1, Pinghua Tang1, Zhongzhou Ren2, Junlong Tian3, Nancy Barraza4, Gabriel Alvarado Barrios4, Lucas Lamata5,6, Enrique Solano4,7,8,† et al.

F. Albarrán-Arriagada9,10

  • 1Hunan Key Laboratory for Micro-Nano Energy Materials and Devices and School of Physics and Optoelectronics, Xiangtan University, Hunan 411105, China
  • 2School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
  • 3Department of Electronic Science, College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, China
  • 4Kipu Quantum, Greifswalderstrasse 226, 10405 Berlin, Germany
  • 5Departamento de Física Atómica, Molecular y Nuclear, Universidad de Sevilla, 41080 Sevilla, Spain
  • 6Instituto Carlos I de Física Teórica y Computacional, 18071 Granada, Spain
  • 7International Center of Quantum Artificial Intelligence for Science and Technology (QuArtist) and Department of Physics, Shanghai University, 200444 Shanghai, China
  • 8IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
  • 9Center for the Development of Nanoscience and Nanotechnology, 9170124 Estación Central, Chile
  • 10Departamento de Física, Universidad de Santiago de Chile (USACH), Avenida Víctor Jara 3493, 9170124 Estación Central, Chile

  • *jpeng@xtu.edu.cn
  • †enr.solano@gmail.com
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Phys. Rev. A 108, L031701 – Published 1 September, 2023

DOI: https://doi.org/10.1103/PhysRevA.108.L031701

Abstract

We propose a high-quality deterministic single-photon source which can not only works in the ultrastrong light-matter coupling regime, but also emits two single photons with an arbitrary time separation, in one excitation process. We find that the special solutions of the two-qubit quantum Rabi and Jaynes-Cummings models which have at most one photon and constant eigenenergies can be used to implement this proposal through two consecutive adiabatic evolutions, and the system goes back to the initial state of the next period automatically after photon emission. Due to their peculiarities and reach of the ultrastrong coupling, the adiabatic evolution can be quite fast and further accelerated with the Stark shift. This Letter paves the way to fast quantum information protocols which take advantage of the ultrastrong coupling and avoid its dynamical complexity simultaneously.

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Phys. Rev. A 108, L031701– Published 1 September, 2023
  • Received 29 November 2022
  • Revised 2 August 2023
  • Accepted 14 August 2023
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