Non-Hermitian Magnon-Photon Interference in an Atomic Ensemble

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Rong Wen
  • Chang-Ling Zou
  • Xinyu Zhu
  • Peng Chen
  • J. F. Chen
  • Weiping Zhang

Detail(s)

Original languageEnglish
Article number253602
Journal / PublicationPhysical Review Letters
Volume122
Issue number25
Online published27 Jun 2019
Publication statusPublished - 28 Jun 2019
Externally publishedYes

Abstract

The interference of photons in a lossy beam splitter (BS) exhibits anticoalescence, which is surprising for bosons. Such a non-Hermitian system involving open quantum dynamics is of particular interest for quantum information processing and metrology. The Hermiticity of photonic devices is generally fixed according to the material, but is controllable at the interface of photons and atomic systems. Here, we demonstrate a tunable non-Hermitian BS for the interference between traveling photonic and localized magnonic modes. The crossover from a Hermitian to a non-Hermitian magnon-photon BS is achieved by controlling the coherent and incoherent interaction mediated by the excited levels of atoms, which is reconfigurable via the detuning of a control laser. A correlated interference pattern between the photons and magnons is demonstrated by such a non-Hermitian BS. Our system has the potential to operate with photons and magnons at the single-quanta level, and it provides a versatile quantum interface for studying the non-Hermitian quantum physics and parity-time symmetry.

Citation Format(s)

Non-Hermitian Magnon-Photon Interference in an Atomic Ensemble. / Wen, Rong; Zou, Chang-Ling; Zhu, Xinyu; Chen, Peng; Ou, Z. Y.; Chen, J. F.; Zhang, Weiping.

In: Physical Review Letters, Vol. 122, No. 25, 253602, 28.06.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review