Quantum tunneling of magnetization in dipolar spin-1 condensates under external fields

Journal Article · Sun Oct 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.043604· OSTI ID:20863945

Limin, Yang ^[1]; Yunbo, Zhang ^[1]

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1. Institute of Theoretical Physics, Shanxi University, Taiyuan 030006 (China)

We study the macroscopic quantum tunneling of magnetization of the F=1 spinor condensate interacting through dipole-dipole interaction with an external magnetic field applied along the longitudinal or transverse direction. We show that the ground state energy and the effective magnetic moment of the system exhibit an interesting macroscopic quantum oscillation phenomenon originating from the oscillating dependence of thermodynamic properties of the system on the vacuum angle. Tunneling between two degenerate minima are analyzed by means of an effective potential method and the periodic instanton method.

• OSTI ID: 20863945
• Journal Information: Physical Review. A, Vol. 74, Issue 4; Other Information: DOI: 10.1103/PhysRevA.74.043604; (c) 2006 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
BOSE-EINSTEIN CONDENSATION
DIPOLES
ELECTRONS
EXCHANGE INTERACTIONS
GROUND STATES
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETIZATION
OSCILLATIONS
PERIODICITY
POTENTIALS
SPIN
THERMODYNAMIC PROPERTIES
TUNNEL EFFECT