Work

Driving Phase Slips in a Superfluid Atom Circuit with a Rotating Weak Link

Year: 2013

Type: article

Abstract: We have observed well-defined phase slips between quantized persistent current states around a toroidal atomic (23Na) Bose-Einstein condensate. These phase slips are induced by a weak link (a localized region of reduced superfluid density) rotated slowly around the ring. This is analogous to the behavior of a superconducting loop with a weak link in the presence of an external magnetic field. When the weak link is rotated more rapidly, well-defined phase slips no longer occur, and vortices enter into the bulk of the condensate. A noteworthy feature of this system is the ability to dynamically vary the current-phase relation of the weak link, a feature which is difficult to implement in superconducting or superfluid helium circuits.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.110.025302

Authors: K. C. Wright, R. B. Blakestad, C. J. Lobb, W. D. Phillips, G. K. Campbell

Institutions: National Institute of Standards and Technology, Joint Quantum Institute

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Office of Naval Research

OpenAlex ID: W1997584947

FWCI: 18.16

Cites: 42

Cited by: 348

Related to: 10