Holographic simulations show supercooled bubble walls in a QCD-like fluid reach at most about 0.13 times light speed, while superheated walls reach only about 0.03.
The enhanced holographic superconductor: is it possible?
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abstract
It is known that time-dependent perturbations can enhance superconductivity and increase the critical temperature. If this phenomenon happens to high-T_c superconductors, one could obtain room-temperature superconductors, but this is still an open issue experimentally. Meanwhile, we would like to understand this phenomenon from gravity dual and see if the enhancement is possible for holographic superconductors. Previous work (arXiv:1104.4098 [hep-th]) has studied this issue by adding a "time-dependent chemical potential," but their analysis is questionable as a true dynamic equilibrium. In particular, the AdS boundary does not supply energy to the bulk spacetime in their setup. A more appropriate way to discuss the enhancement is to add a time-dependent vector potential, i.e., a time-dependent electric field. However, the enhancement does not occur for holographic superconductors.
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Bubble dynamics in a QCD-like phase diagram
Holographic simulations show supercooled bubble walls in a QCD-like fluid reach at most about 0.13 times light speed, while superheated walls reach only about 0.03.