Time-dependent density-functional theory for superfluids
INFM and Classe di Scienze,
Scuola Normale Superiore - I-56126 Pisa, Italy
Accepted: 6 November 2000
A density-functional theory is established for inhomogeneous superfluids at finite temperature, subject to time-dependent external fields in isothermal conditions. After outlining parallelisms between a neutral superfluid and a charged superconductor, Hohenberg-Kohn-Sham-type theorems are proved for gauge-invariant densities and a set of Bogolubov-Popov equations including exchange and correlation is set up. Earlier results applying in the linear-response regime are recovered.
PACS: 03.75.Fi – Phase coherent atomic ensembles; quantum condensation phenomena / 31.15.Ew – Density-functional theory / 47.37.+q – Hydrodynamic aspects of superfluidity
© EDP Sciences, 2001