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Transmission of Excitations in a Spin-1 Bose-Einstein Condensate through a Barrier
- Publication Year :
- 2011
- Publisher :
- arXiv, 2011.
-
Abstract
- We investigate tunneling of excitations across a potential barrier separating two spin-1 Bose-Einstein condensates. Using the mean-field theory at the absolute zero temperature, we determine 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 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.<br />Comment: 45 pages, 16 figures
- Subjects :
- Physics
Condensed Matter::Quantum Gases
Condensed matter physics
FOS: Physical sciences
Atomic and Molecular Physics, and Optics
law.invention
Magnetization
Mean field theory
law
Quantum Gases (cond-mat.quant-gas)
Rectangular potential barrier
Condensed Matter - Quantum Gases
Wave function
Absolute zero
Bose–Einstein condensate
Quantum tunnelling
Spin-½
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....4df3fa201e9255371474c3a950c38b3d
- Full Text :
- https://doi.org/10.48550/arxiv.1103.1004