Entanglement degradation in a string of atoms coupled by the electromagnetic field

P. Földi, M. Benedict, Tamás Serényi, Attila Czirják

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We investigate the dynamics of short linear chains consisting of two-level systems (atoms) coupled by the electromagnetic field. The environment of photon modes acts as a source of noise and leads to the disappearance of the initially present multipartite entanglement. The rate of this process (entanglement degradation) depends on the separation of the atoms, and also on the initial state. With the aid of the appropriate entanglement witnesses we show that this rate is exceptionally low for the so-called subradiant states. Below one resonant wavelength of atomic separation the effect of the environmental noise is weaker than the dipole-dipole interaction and multipartite entanglement can be formed in the initial stage of the time evolution.

Original languageEnglish
JournalFluctuation and Noise Letters
Volume4
Issue number3
DOIs
Publication statusPublished - Sep 2004

Fingerprint

Entanglement
Electromagnetic Fields
electromagnetic fields
Degradation
strings
Strings
degradation
dipoles
Dipole
atoms
photons
wavelengths
Photon
interactions
Wavelength
Interaction

Keywords

  • Decoherence
  • Entanglement degradation
  • Master equation
  • Multipartite entanglement
  • Superradiance

ASJC Scopus subject areas

  • Mathematics(all)

Cite this

Entanglement degradation in a string of atoms coupled by the electromagnetic field. / Földi, P.; Benedict, M.; Serényi, Tamás; Czirják, Attila.

In: Fluctuation and Noise Letters, Vol. 4, No. 3, 09.2004.

Research output: Contribution to journalArticle

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