Ground-state fidelity and bipartite entanglement in the Bose-Hubbard model
Anno: 2007
Autori: Buonsante P., Vezzani A.
Affiliazione autori: 1) Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
2) Dipartimento di Fisica, Università degli Studi di Parma, Parco Area delle Scienze 7/a, I-43100 Parma, Italy
Abstract: We analyze the quantum phase transition in the Bose-Hubbard model borrowing two tools from quantum-information theory, i.e., the ground-state fidelity and entanglement measures. We consider systems at unitary filling comprising up to 50 sites and show for the first time that a finite-size scaling analysis of these quantities provides excellent estimates for the quantum critical point. We conclude that fidelity is particularly suited for revealing a quantum phase transition and pinning down the critical point thereof, while the success of entanglement measures depends on the mechanisms governing the transition.
Giornale/Rivista: PHYSICAL REVIEW LETTERS
Volume: 98 (11) Da Pagina: 110601-1 A: 110601-4
Parole chiavi: entanglement; fidelity; quantum phase transitionsDOI: 10.1103/PhysRevLett.98.110601Citazioni: 196dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui
