Condensate of excitations in moving superfluids
Abstract
A possibility of the condensation of excitations with a non-zero momentum in rectilinearly moving and rotating superfluid bosonic and fermionic (with Cooper pairing) media is considered in terms of a phenomenological order-parameter functional at zero and non-zero temperature. The results might be applicable to the description of bosonic systems like superfluid He, ultracold atomic Bose gases, charged pion and kaon condensates in rotating neutron stars, and various superconducting fermionic systems with pairing, like proton and color-superconducting components in compact stars, metallic superconductors, and neutral fermionic systems with pairing, like the neutron component in compact stars and ultracold atomic Fermi gases. Order parameters of the "mother" condensate in the superfluid and the new condensate of excitations, corresponding energy gains, critical temperatures and critical velocities are found.
Keywords
Cite
@article{arxiv.1611.05093,
title = {Condensate of excitations in moving superfluids},
author = {E. E. Kolomeitsev and D. N. Voskresensky},
journal= {arXiv preprint arXiv:1611.05093},
year = {2016}
}
Comments
15 pages, 1 figure reworked and extended version of arXiv:1501.00731 submitted to Prog. Theor Exp. Phys