Transmission of excitations in a spin-1 Bose-Einstein condensate through a barrier

Journal Article · Sun May 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.053624· OSTI ID:21546837

Watabe, Shohei ^[1]; Kato, Yusuke ^[2]

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1. Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)
2. Department of Basic Science, University of Tokyo, Tokyo 153-8902 (Japan)

We investigate tunneling of excitations across a potential barrier separating two spin-1 Bose-Einstein condensates. Using mean-field theory at absolute zero temperature, we determine the transmission coefficients of excitations in the saturated magnetization state and unsaturated magnetization states. All excitations, except the quadrupolar spin mode in the saturated magnetization state, show the anomalous tunneling phenomenon characterized as perfect tunneling in the low-momentum limit through a potential barrier. The quadrupolar spin mode in the saturated magnetization state, whose spectrum is massive, shows total reflection. We discuss properties common between excitations showing the anomalous tunneling phenomenon. Excitations showing perfect tunneling have a gapless spectrum in the absence of the magnetic field, and their wave functions in the low-energy limit are the same as the condensate wave function.

• OSTI ID: 21546837
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BOSE-EINSTEIN CONDENSATION
ENERGY-LEVEL TRANSITIONS
EXCITATION
FUNCTIONS
MAGNETIC FIELDS
MAGNETIZATION
MEAN-FIELD THEORY
PARTICLE PROPERTIES
POTENTIALS
REFLECTION
SPECTRA
SPIN
TEMPERATURE ZERO K
TRANSMISSION
TUNNEL EFFECT
WAVE FUNCTIONS