Jahr | 2014 |
Autor(en) | S. Eckel, F. Jendrzejewski, A. Kumar, C. J. Lobb, G. K. Campbell |
Titel | Interferometric Measurement of the Current-Phase Relationship of a Superfluid Weak Link |
KIP-Gruppe(n) | F21 |
Dokumentart | Paper |
Keywords (angezeigt) | JQI |
Quelle | Phys. Rev. X 4 (2014) 031052 |
doi | 10.1103/PhysRevX.4.031052 |
Abstract (en) | Weak connections between superconductors or superfluids can differ from classical links due to quantum coherence, which allows flow without resistance. Transport properties through such weak links can be described with a single function, the current-phase relationship, which serves as the quantumanalog of the current-voltage relationship. Here, we present a technique for inteferometrically measuring the current-phase relationship of superfluid weak links. We interferometrically measure the phase gradient around a ring-shaped superfluid Bose-Einstein condensate containing a rotating weak link, allowing us to identify the current flowing around the ring. While our Bose-Einstein condensate weak link operates in the hydrodynamic regime, this technique can be extended to all types of weak links (including tunnel junctions) in any phase-coherent quantum gas. Moreover, it can also measure the current-phase relationships of excitations. Such measurements may open new avenues of research in quantum transport. |
bibtex | @article{Eckel2014a, author = {S. Eckel, F. Jendrzejewski, A. Kumar, C. J. Lobb, G. K. Campbell}, title = {Interferometric Measurement of the Current-Phase Relationship of a Superfluid Weak Link}, journal = {Phys. Rev. X}, year = {2014}, volume = {4}, number = {3}, pages = {031052}, month = {sep}, doi = {10.1103/PhysRevX.4.031052}, url = {http://link.aps.org/doi/10.1103/PhysRevX.4.031052} } |
Beispielbild | |
URL | Eckel2014a |