Influence of trapping potentials on the phase diagram of bosonic atoms in optical lattices

Journal Article · Wed Dec 01 00:00:00 EST 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.70.061601· OSTI ID:20649882

Giampaolo, S M; Illuminati, F; Mazzarella, G; De Siena, S ^[1]

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1. Dipartimento di Fisica 'E. R. Caianiello', Universita di Salerno, INFM UdR di Salerno, INFN Sezione di Napoli-Gruppo Collegato di Salerno, I-84081 Baronissi, SA (Italy)

We study the effect of external trapping potentials on the phase diagram of bosonic atoms in optical lattices. We introduce a generalized Bose-Hubbard Hamiltonian that includes the structure of the energy levels of the trapping potential, and show that these levels are in general populated both at finite and zero temperature. We characterize the properties of the superfluid transition for this situation and compare them with those of the standard Bose-Hubbard description. We briefly discuss similar behaviors for fermionic systems.

• OSTI ID: 20649882
• Journal Information: Physical Review. A, Vol. 70, Issue 6; Other Information: DOI: 10.1103/PhysRevA.70.061601; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSONS
COMPARATIVE EVALUATIONS
ENERGY LEVELS
FERMIONS
HAMILTONIANS
PHASE DIAGRAMS
POTENTIALS
RADIATION PRESSURE
SUPERFLUIDITY
TRAPPING