Physics – Condensed Matter – Quantum Gases
Scientific paper
2011-10-21
Physics
Condensed Matter
Quantum Gases
Scientific paper
Quantum confinement is known to influence fermionic condensates, resulting in quantum-size oscillations of superfluid/superconducting properties. Here we show that the impact of quantum-size effects is even more dramatic. Under realistic conditions, a significant phase-space reconfiguration induced by quantum-size effects opens a quasi-molecule channel in the fermionic pairing so that the condensed pairs exhibit features typical of a molecular state. As an illustration we consider a quasi-one-dimensional fermionic condensate, as realized, e.g., in cigar-shaped atomic Fermi gases or superconducting quantum wires. In this case the transverse quantization of the particle motion favors pairing through a coherent superposition of quantum channels that are formed due to the grouping of single-particle levels into a series of well distinguished subbands. Whenever the bottom of a subband approaches the Fermi level, the longitudinal spatial distribution of fermions in a condensed pair becomes strongly localized within the corresponding quantum channel. The fermionic pairs in this channel resemble molecules with bosonic character.
Axt V. M.
Croitoru M. D.
Peeters François M.
Perali Andrea
Shanenko A. A.
No associations
LandOfFree
BCS-BEC crossover-like phenomena driven by quantum-size effects in quasi-one-dimensional fermionic condensates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with BCS-BEC crossover-like phenomena driven by quantum-size effects in quasi-one-dimensional fermionic condensates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and BCS-BEC crossover-like phenomena driven by quantum-size effects in quasi-one-dimensional fermionic condensates will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-85722