Quantum beat and entanglement of multi-qubits interacting with a common reservoir

Arata Sato, Junko Ishi-Hayase, Fujio Minami, Masahide Sasaki

Research output: Contribution to journalArticle

2 Citations (Scopus)


The qubits can be entangled when they interact with a common Ohmic reservoir. We analyze how the reservoir-induced entanglement of qubits can be observed as the beat signal in the decay curve of the macroscopic polarization. The origin of this effect is the Lamb phase shift on the qubit array. We quantify the amount of the reservoir-induced entanglement and show how to experimentally evaluate it from the decay curve of the macroscopic polarization. We discuss how the beat signal can be discriminated from the other kinds of beat signals. We also show that our analysis can be used to estimate the reservoir characteristics.

Original languageEnglish
Pages (from-to)508-512
Number of pages5
JournalJournal of Luminescence
Issue numberSPEC. ISS.
Publication statusPublished - 2006 Jul 1
Externally publishedYes



  • Decoherence
  • Entanglement
  • Free induction decay
  • Quantum beat

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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