Entanglement modulation in a spin chain by a local impurity (Articolo in rivista)

Type
Label
  • Entanglement modulation in a spin chain by a local impurity (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1142/S0219749908003797 (literal)
Alternative label
  • Apollaro, TJG (Apollaro, Tony J. G.)1,2; Cuccoli, A (Cuccoli, Alessandro)1,2; Fubini, A (Fubini, Andrea)1,2; Plastina, F (Plastina, Francesco)3,4; Verrucchi, P (Verrucchi, Paola)5 (2008)
    Entanglement modulation in a spin chain by a local impurity
    in International journal of quantum information
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Apollaro, TJG (Apollaro, Tony J. G.)1,2; Cuccoli, A (Cuccoli, Alessandro)1,2; Fubini, A (Fubini, Andrea)1,2; Plastina, F (Plastina, Francesco)3,4; Verrucchi, P (Verrucchi, Paola)5 (literal)
Pagina inizio
  • 567 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 6 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. Univ Florence, Dipartimento Fis, I-50019 Sesto Fiorentino, FI, Italy 2. CNISM Consorzio Nazl, I-50019 Sesto Fiorentino, FI, Italy 3. Univ Calabria, Dept Fis, I-87036 Arcavacata Di Rende, CS, Italy 4. INFN Grp Collegato Cosenza, I-87036 Arcavacata Di Rende, CS, Italy 5. CNR - Ctr Ric & Sviluppo Stat, I-50019 Sesto Fiorentino, FI, Italy (literal)
Titolo
  • Entanglement modulation in a spin chain by a local impurity (literal)
Abstract
  • We study the ground-state entanglement properties of an XX spin 1/2 chain in transverse field, in its quasi-long-ranged ordered phase, with a magnetic impurity, represented in terms of an additional transverse magnetic field located at one precise site. For such a system, we show that a control of the ground state entanglement can be achieved by acting on the impurity field. To demonstrate this possibility, we evaluate exactly the nearest neighbor and next-nearest neighbor concurrence in the presence of the impurity. It turns out that either an enhancement or a quenching of entanglement between selected spin pairs can be obtained by acting on the intensity of the impurity. For specific values of the magnetic field a spatial modulation of concurrence along the chain is also obtained. (literal)
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