KIP-Veröffentlichungen

Jahr 2016
Autor(en) S. Eckel, Jeffrey G. Lee, F. Jendrzejewski, C. J. Lobb, Gretchen K. Campbell, W. T. Hill
Titel Contact resistance and phase slips in mesoscopic superfluid-atom transport
KIP-Gruppe(n) F21
Dokumentart Paper
Keywords (angezeigt) JQI
Quelle Phys. Rev. A 93 (2016) 063619
doi 10.1103/PhysRevA.93.063619
Abstract (en)

We have experimentally measured transport of superfluid, bosonic atoms in a mesoscopic system: a small channel connecting two large reservoirs. Starting far from equilibrium (superfluid in a single reservoir), we observe first resistive flow transitioning at a critical current into superflow, characterized by long-lived oscillations. We reproduce this full evolution with a simple electronic circuit model. We find that the resistance is consistent with phase slips and the associated creation of vortices, as proposed in [R. P. Feynman, in Prog. Low Temp. Phys., edited by C. J. Gorter (North Holland Publishing Company, Amsterdam, 1955), Chap. 2]. We also show that the oscillations are consistent with LC oscillations as estimated by the kinetic inductance and effective capacitance in our system. Our system allows only a few single-particle, transverse modes to propagate, a situation that, for fermions, would lead to a conductance of only a few h−1. By contrast, in our bosonic system, we observe conductances of thousands of h−1, showing the definitive role played by particle statistics.

bibtex
@article{Lee2015a,
  author   = {S. Eckel, Jeffrey G. Lee, F. Jendrzejewski, C. J. Lobb, Gretchen K. Campbell, W. T. Hill},
  title    = {Contact resistance and phase slips in mesoscopic superfluid-atom transport},
  journal  = {Phys. Rev. A},
  year     = {2016},
  volume   = {93},
  number   = {6},
  pages    = {063619},
  month    = {jun},
  doi      = {10.1103/PhysRevA.93.063619},
  url      = {http://journals.aps.org/pra/abstract/10.1103/PhysRevA.93.063619 http://link.aps.org/doi/10.1103/PhysRevA.93.063619}
}
Beispielbild
URL Lee2015a
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