Equilibrium properties and dissipative dynamics of vortex arrays in trapped Bose-condensed gases

Autor:	A. E. Muryshev, Petr O. Fedichev
Rok vydání:	2002
Předmět:	Condensed Matter::Quantum Gases Quantum fluid Physics Condensed matter physics Pulsar Condensed Matter::Superconductivity Vortex stretching Thermal Vorticity Dissipative dynamics Atomic and Molecular Physics and Optics Vortex
Zdroj:	Physical Review A. 65
ISSN:	1094-1622 1050-2947
DOI:	10.1103/physreva.65.061601
Popis:	We develop a theory of equilibrium properties and dissipative dynamics of large vortex arrays in trapped Bose-condensed gases. We prove that, in spite of the spatial inhomogeneity of the condensate density profile in trapped gases, the equilibrium configuration corresponds to a vortex array of uniform density. We show that in a static trap the interaction of the vortex array with thermal excitations leads to a nonexponential decay of the vortex structure, and the characteristic lifetime depends on the initial density of vortices. Drawing an analogy with physics of pulsars, we propose an experiment that employs the decay induced heating of the thermal cloud as a tool for a nondestructive study of the vortex dynamics.
Databáze:	OpenAIRE
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