Phase separation and exotic vortex phases in a two-species holographic superfluid

Abstract

At finite temperature, the stable equilibrium states of coupled two-component Bose Einstein condensations (BECs) with the same conformal mass in both non-rotating and rotating condition can be obtained by studying its real dynamics via holography. The equilibrium state is the state where the free energy reaches the minimum and does not change any more. In the case of no rotation, the spatial phase separated states of the two components become more stable than the miscible condensates state when the direct repulsive inter-component coupling constant $$\eta>\eta _c>0$$ η > η c > 0 . Under rotation, the quantum fluid reveals four equilibrium structures of vortex states by varying the $$\eta $$ η from the miscible region to the phase separated region. Among the four structures, the vortex sheet solution is the most exotic one that appears in the phase separated region.

Dynamical stability from quasi normal modes in 2nd, 1st and 0th order holographic superfluid phase transitions

“…The dynamical evolution and non-equilibrium physics of the holographic superfluid model have been investigated in several studies (see [7][8][9][10][11][12][13][14][15][16][17][18][19][20] for a non exhaustive list) and even extended to supersolid phases [21] or in presence of momentum dissipation [22][23][24][25].…”

Splitting of doubly quantized vortices in holographic superfluid of finite temperature

“…Compared to this traditional approach, holographic duality provides us a first principle description of finite temperature superfluid dynamics by the bulk hairy black hole [32,33]. Actually, much effort has been devoted to the characteristic features of vortex and its non-equilibrium dynamics through the lenses of holography [34][35][36][37][38][39][40][41][42][43][44][45][46][47]. The purpose of the current paper is to initiate our holographic investigation of vortex splitting by focusing on the splitting of doubly quantized vortex in the finite temperature holographic superfluid.…”

Splitting of doubly quantized vortices in holographic superfluid of finite temperature

“…Compared to this traditional approach, holographic duality provides us a first principle description of finite temperature superfluid dynamics by the bulk hairy black hole [50,51]. Actually, much effort has been devoted to the characteristic features of vortex and its non-equilibrium dynamics through the lenses of holography [52][53][54][55][56][57][58][59][60][61][62][63][64][65][66]. The purpose of the current paper is to initiate our holographic investigation of vortex splitting by focusing on the splitting of doubly quantized vortex in the finite temperature holographic superfluid.…”