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Detecting the relative phase between different frequency components of a photon using a three-level Λ atom coupled to a waveguide

Janet Zhong1, Rituraj2, Fatih Dinc1, and Shanhui Fan1,3,*

  • 1Department of Applied Physics, Stanford University, Stanford, California 94305, USA
  • 2Department of Electrical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
  • 3Department of Electrical Engineering, Ginzton Laboratory, Stanford University, Stanford, California 94305, USA

  • *shanhui@stanford.edu
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Phys. Rev. A 107, L051702 – Published 30 May, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.L051702

Abstract

We study the scattering inside a waveguide of a single photon with a single three-level Λ atom, both of which are in a superposition state. The photon is in a superposition state of two frequencies, whereas the atoms are in a superposition state of two nondegenerate ground states. We find that the scattering depends on both the relative phase between the photon frequencies and the relative phase between the atomic ground states. Our results show that a three-level Λ atom coupled to a waveguide can be used as a photon phase filter that could detect the relative phase between the two frequencies of the photon superposition state.

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Phys. Rev. A 107, L051702– Published 30 May, 2023
  • Received 28 August 2022
  • Accepted 8 May 2023
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