Abstract
We show the exact solution of Bogoliubov equations at zero-energy in the critical supercurrent state for arbitrary shape of potential barrier. With use of this solution, we prove the absence of perfect transmission of excitations in the low-energy limit by giving the explicit expression of transmission coefficient. The origin of disappearance of perfect transmission is the emergence of zero-energy density fluctuation near the potential barrier.
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Takahashi, D., Kato, Y. Exact Results for Tunneling Problems of Bogoliubov Excitations in the Critical Supercurrent State. J Low Temp Phys 158, 65–71 (2010). https://doi.org/10.1007/s10909-009-0036-3
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DOI: https://doi.org/10.1007/s10909-009-0036-3
Keywords
- Bose-Einstein condensate
- Gross-Pitaevskii equation
- Bogoliubov equations
- Anomalous tunneling
- Critical supercurrent state