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 |