Phase separation in optical lattices in a spin-dependent external potential

Journal Article · Fri Jan 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.013628· OSTI ID:21388790

Chen, A-Hai ^[1]; Xianlong, Gao ^[1]

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1. Department of Physics, Zhejiang Normal University, Jinhua 340012 (China)

We investigate the phase separation in one-dimensional Fermi gases on optical lattices. The density distributions and the magnetization are calculated by means of the density-matrix renormalization method. The phase separation between spin-up and spin-down atoms is induced by the interplay of the spin-dependent harmonic confinement and the strong repulsive interaction between intercomponent fermions. We find the existence of a critical repulsive interaction strength above which the phase separation evolves. By increasing the trap imbalance, the composite phase of the Mott-insulating core is changed into one of the ferromagnetic insulating core, which is incompressible and originates from the Pauli exclusion principle.

• OSTI ID: 21388790
• Journal Information: Physical Review. A, Vol. 81, Issue 1; Other Information: DOI: 10.1103/PhysRevA.81.013628; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
AUGMENTATION
CONFINEMENT
DENSITY MATRIX
FERMI GAS
FERMIONS
INTERACTIONS
MAGNETIZATION
ONE-DIMENSIONAL CALCULATIONS
PAULI PRINCIPLE
POTENTIALS
RENORMALIZATION
SPIN
TRAPS
ANGULAR MOMENTUM
MATRICES
PARTICLE PROPERTIES