TY - JOUR
T1 - Enhanced quasi-particle current of Bogoliubov phonons in a Bose-Einstein condensate
AU - Tsuchiya, Shunji
AU - Ohashi, Yoji
PY - 2009
Y1 - 2009
N2 - We discuss tunneling properties of Bogoliubov excitations through a potential barrier. We find that the quasi-particle current carried by Bogoliubov excitations is remarkably enhanced near the potential barrier at low incident energies. This explains the increase of the transmission probability of Bogoliubov phonons in the low energy region. In addition, taking into account of the backreaction of Bogoliubov excitations on Bose condensates, we show that the quasi-particle current twists the phase of the condensate wavefunction, leading to a Josephson supercurrent through the barrier.
AB - We discuss tunneling properties of Bogoliubov excitations through a potential barrier. We find that the quasi-particle current carried by Bogoliubov excitations is remarkably enhanced near the potential barrier at low incident energies. This explains the increase of the transmission probability of Bogoliubov phonons in the low energy region. In addition, taking into account of the backreaction of Bogoliubov excitations on Bose condensates, we show that the quasi-particle current twists the phase of the condensate wavefunction, leading to a Josephson supercurrent through the barrier.
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U2 - 10.1088/1742-6596/150/3/032113
DO - 10.1088/1742-6596/150/3/032113
M3 - Article
AN - SCOPUS:77952495593
SN - 1742-6588
VL - 150
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 3
M1 - 032113
ER -