Thermally induced rotons in two-dimensional dilute Bose gases

Details Thermally induced rotons in two-dimensional dilute Bose gases Thermally induced rotons in two-dimensional dilute Bose gases

2005-03-21

arxiv.org/abs/cond-mat/0503523v4

Phys. Rev. B 73, 104515 (2006)

Physics

Condensed Matter

Other Condensed Matter

21 pages; 2 figures; v4: version accepted for publication in PRB; in this version Section IV is considerably extended

Scientific paper

10.1103/PhysRevB.73.104515

We show that roton-like excitations are thermally induced in a two-dimensional dilute Bose gas as a consequence of the strong phase fluctuations in two dimensions. At low momentum, the roton-like excitations lead for small enough temperatures to an anomalous phonon spectrum with a temperature dependent exponent reminiscent of the Kosterlitz-Thouless transition. Despite the anomalous form of the energy spectrum, it is shown that the corresponding effective theory of vortices describes the usual Kosterlitz-Thouless transition. The possible existence of an anomalous normal state in a small temperature interval is also discussed.

Affiliated with

Also associated with

No associations

Rating

Thermally induced rotons in two-dimensional dilute Bose gases does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Thermally induced rotons in two-dimensional dilute Bose gases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermally induced rotons in two-dimensional dilute Bose gases will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-159889