Black and gray solitons in holographic superfluids at zero temperature
Abstract
We construct gray soliton configurations, which move at constant speeds, in holographic superfluids for the first time. Since there should be no dissipation for a moving soliton to exist, we use the simplest holographic superfluid model at zero temperature, considering both the standard and alternative quantizations. For comparison purpose, we first investigate black solitons in the zero temperature holographic superfluids, which are static configurations. Then we focus on the numerical construction of gray solitons under both quantizations, which interpolate between the (static) black solitons and sound waves (moving at the speed of sound). Interestingly, under the standard quantization, a peculiar oscillation of the soliton configurations is observed, very much resembling the Friedel oscillation in fermionic superfluids at the BCS regime. Some implications and other aspects of the soliton configurations are also discussed.
 Publication:

Journal of High Energy Physics
 Pub Date:
 May 2019
 DOI:
 10.1007/JHEP05(2019)167
 arXiv:
 arXiv:1903.12463
 Bibcode:
 2019JHEP...05..167G
 Keywords:

 AdSCFT Correspondence;
 Gaugegravity correspondence;
 Holography and condensed matter physics (AdS/CMT);
 Solitons Monopoles and Instantons;
 High Energy Physics  Theory;
 Condensed Matter  Quantum Gases;
 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 v2: typos and figures corrected, JHEP in press