Topology-induced confined superfluidity in inhomogeneous arrays
Anno: 2004
Autori: Buonsante P., Burioni R., Cassi D., Penna V., Vezzani A.
Affiliazione autori: Dipartimento di Fisica and INFM, Politecnico di Torino; Dipartimento di Fisica and INFM, Università degli Studi di Parma
Abstract: We report a study of the zero-temperature phase diagram of the Bose-Hubbard model on topologically inhomogeneous arrays. We show that the usual Mott-insulator and superfluid domains, in the paradigmatic case of the comb lattice, are separated by regions where the superfluid behavior of the bosonic system is confined along the comb backbone. The existence of such confined superfluidity, arising from topological inhomogeneity, is proved by different analytical and numerical techniques which we extend to the case of inhomogeneous arrays. We also discuss the relevance of our results to real systems exhibiting macroscopic phase coherence, such as coupled Bose condensates and Josephson arrays.
Giornale/Rivista: PHYSICAL REVIEW B
Volume: 70 (22) Da Pagina: 224510 A: 224510
Parole chiavi: coupled bose einstein condensate; quantum phase transitions; topological inhomogeneityDOI: 10.1103/PhysRevB.70.224510Citazioni: 9dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti 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