Long-lived entanglement of two multilevel atoms in a waveguide

Paolo Facchi, Saverio Pascazio, Francesco V. Pepe*, Kazuya Yuasa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We study the presence of nontrivial bound states of two multilevel quantum emitters and the photons propagating in a linear waveguide, when the emitters can be modeled as harmonic oscillators. We characterize the conditions for the existence of such states and determine their general properties, focusing in particular on the entanglement between the two emitters, that increases with the number of excitations. We discuss the relevance of our results for entanglement preservation and generation by spontaneous relaxation processes. We finally introduce a perturbative method for determining the existence of long-lived states, for general level spacings and couplings.

Original languageEnglish
Article number035006
JournalJournal of Physics Communications
Issue number3
Publication statusPublished - 2018 Mar


  • Bound states
  • Entanglement generation
  • Waveguide QED

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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