40 research outputs found
Correspondence of phase transition points and singularities of thermodynamic geometry of black holes
We explore a formulation of thermodynamic geometry of black holes and prove
that the divergent points of the specific heat correspond exactly to the
singularities of the thermodynamic curvature. We investigate this
correspondence for different types of black holes. This formulation can also be
applied to an arbitrary thermodynamic system.Comment: 10 pages, 4 figures, typos fixed, references adde
Non-Abelian Aharonov-Bohm effect with the time-dependent gauge fields
We investigate the non-Abelian Aharonov-Bohm (AB) effect for time-dependent
gauge fields. We prove that the non-Abelian AB phase shift related to
time-dependent gauge fields, in which the electric and magnetic fields are
written in the adjoint representation of generators, vanishes up to the
first order expansion of the phase factor. Therefore, the flux quantization in
a superconductor ring does not appear in the time-dependent Abelian or
non-Abelian AB effect.Comment: 4 page
Diffusivities bounds in the presence of Weyl corrections
In this paper, we investigate the behavior of the thermoelectric DC
conductivities in the presence of Weyl corrections with momentum dissipation in
the incoherent limit. Moreover, we compute the butterfly velocity and study the
charge and energy diffusion with broken translational symmetry. Our results
show that the Weyl coupling , violates the bounds on the charge and
energy diffusivity. It is also shown that the Weyl corrections violate the
bound on the DC electrical conductivity in the incoherent limit.Comment: v4: The appendix D and E were adde
Holographic Complexity in Gauge/String Superconductors
Following a methodology similar to \cite{Alishahiha:2015rta}, we derive a
holographic complexity for two dimensional holographic superconductors
(gauge/string superconductors) with backreactions. Applying a perturbation
method proposed by Kanno in Ref. \cite{kanno}, we study behaviors of the
complexity for a dual quantum system near critical points. We show that when a
system moves from the normal phase () to the superconductor phase
(), the holographic complexity will be divergent.Comment: 6 page