Anomalous tunneling of collective excitations and effects of superflow in the polar phase of a spin-1 spinor Bose-Einstein condensate
arXiv:1105.2857 · doi:10.1103/PhysRevA.84.013616
Abstract
We investigate tunneling properties of collective modes in the polar phase of a spin-1 spinor Bose-Einstein condensate. This spinor BEC state has two kinds of gapless modes, i.e., Bogoliubov mode and spin-wave. Within the framework of the mean-field theory at T=0, we show that these Goldstone modes exhibit the perfect transmission in the low-energy limit. Their anomalous tunneling behaviors still hold in the presence of superflow, except in the critical current state. In the critical current state, while the tunneling of Bogoliubov mode is accompanied by finite reflection, the spin-wave still exhibit the perfect transmission, unless the strengths of a spin-dependent and spin-independent interactions take the same value.
8 pages, 3 figures
References in corpus (11)
- Mechanism of Anomalous Tunneling in Condensed Bose System
- Reflection and Refraction of Bose-condensate Excitations
- Absence of Anomalous Tunneling of Bogoliubov Excitations for Arbitrary Potential Barrier under the Critical Condensate Current
- Anomalous enhancement of quasiparticle current near a potential barrier in a Bose-Einstein condensate
- Supercurrent behavior of low-energy Bogoliubov phonon and anomalous tunneling effect in a Bose-Einstein condensate
- Tunneling properties of Bogoliubov mode and spin wave modes in supercurrent states of a spin-1 ferromagnetic spinor Bose-Einstein condensate
- Supercurrent induced by tunneling Bogoliubov excitations in a Bose-Einstein condensate
- Dynamical Density Fluctuation of Superfluids near Critical Velocities
- Transmission of Excitations in a Spin-1 Bose-Einstein Condensate through a Barrier
- Transmission and Reflection of Collective Modes in Spin-1 Bose-Einstein Condensate
- Exact Results for Tunneling Problems of Bogoliubov Excitations in the Critical Supercurrent State
Cited by in corpus (4)
- Counting rule of Nambu-Goldstone modes for internal and spacetime symmetries: Bogoliubov theory approach
- Stability Criterion for Superfluidity based on the Density Spectral Function
- Anomalous Scattering of Low-lying Excitations in a Spin-1 Bose-Einstein Condensate
- Perfect transmission and perfect reflection of Bogoliubov quasiparticles in a dynamically unstable Bose-Einstein condensate