Insulator-Superfluid transition of spin-1 bosons in an optical lattice in magnetic field

Abstract

We study the insulator-superfluid transition of spin-1 bosons in an optical lattice in a uniform magnetic field. Based on a mean-field approximation we obtained a zero-temperature phase diagram. We found that depending on the particle number the transition for bosons with antiferromagnetic interaction may occur into different superfluid phases with spins aligned along or opposite to the field direction. This is qualitatively different from the field-free transition for which the mean-field theory predicts a unique (polar) superfluid state for any particle number.

10 pages, 2 eps figures

References in corpus (5)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Commensurate-incommensurate transition of cold atoms in an optical lattice
• Superfluidity and Interference Pattern of Ultracold Bosons in Optical Lattices
• Bogoliubov approach to superfluidity of atoms in an optical lattice
• Quantum Phase Transition of Spin-2 Cold Bosons in an Optical Lattice

Cited by in corpus (15)

• Precision measurement of spin-dependent interaction strengths for spin-1 and spin-2 87Rb atoms
• Phase diagram of spin-1 bosons on one-dimensional lattices
• Ultracold bosons with short-range interaction in regular optical lattices
• First-order superfluid-Mott insulator transition of spinor bosons in an optical lattice
• Spin-1 bosons with coupled ground states in optical lattices
• Magnetization plateaus for spin-one bosons in optical lattices: Stern-Gerlach experiments with strongly correlated atoms
• Multi-site mean-field theory for cold bosonic atoms in optical lattices
• Paired state in an integrable spin-1 boson model
• First excited band of a spinor Bose-Einstein condensate
• Superfluid phases of spin-1 bosons in cubic optical lattice
• Superfluid-Mott Insulator Transition of Spin-2 Cold Bosons in an Optical Lattice in a Magnetic Field
• Spin-1 bosons in an external magnetic field and a three body interaction potential
• Phase diagrams and multistep condensations of spin-1 bosonic gases in optical lattices
• Phase transitions and spin excitations of spin-1 bosons in optical lattice
• Quantum entanglement of spin-1 bosons with coupled ground states in optical lattices