Quantum magnetism and counterflow supersolidity of up-down bosonic dipoles
Anno: 2010
Autori: Trefzger C., Alloing M., Menotti C., Dubin F., Lewenstein M.
Affiliazione autori: ICFO Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain;
CNR – Istituto Nazionale di Ottica BEC Center and Dipartimento di Fisica, Universita’ di Trento, 38123 Povo, Italy;
ICREA Institucio Catalana de Recerca i Estudis Avanats, Lluis Companys 23, E-08010 Barcelona, Spain
Abstract: We study a gas of dipolar bosons confined in a two-dimensional optical lattice. Dipoles are considered to point freely in both up and down directions perpendicular to the lattice plane. This results in a nearest-neighbor repulsive (attractive) interaction for aligned (anti-aligned) dipoles. We find regions of parameters where the ground state of the system exhibits insulating phases with ferromagnetic or anti-ferromagnetic ordering, as well as with rational values of the average magnetization. Evidence for the existence of a novel counterflow supersolid quantum phase is also presented.
Giornale/Rivista: NEW JOURNAL OF PHYSICS
Volume: 12 Da Pagina: 093008 A: 093008
Parole chiavi: dipolar atoms; quantum magnetisms; DOI: 10.1088/1367-2630/12/9/093008Citazioni: 19dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-28Riferimenti 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