The properties of QCD matter at finite isospin densities are investigated employing holographic hard-wall and soft-wall AdS/QCD models. It is confirmed that at high enough isospin densities, charged pions start to condense and the pion superfluid phase appears in the system. It is shown that the chiral condensate and the pion condensate can be transformed to each other and form a `chiral...
A large class of black holes have a near-horizon AdS_2 throat region. Using the recent progress on the nearly AdS_2 Jackiw-Teitelboim gravity theory, we can study the quantum gravity effects of the near-horizon AdS_2 region and then lift them to higher-dimensional black holes. It turns out these apparently trivial effects of quantum gravity can play crucial roles in the near-extremal AdS/CFT...
Casimir effect is a novel boundary quantum effect that originates from the changes of vacuum energy due to the boundary. Is there a fundamental bound of Casimir effect? This talk tries to address this critical question. Inspired by the KSS bound, we propose that the holographic theory imposes a universal bound of Casimir effect. We verify this universal bound by free BCFTs, and provide...
We study three-dimensional gravity on a spacetime bounded by a generic two-dimensional causal surface, constructing the solution phase space specified by four generic functions over the causal boundary. We discuss the symplectic form, boundary charges, and their algebra, providing a fluid description at the causal boundary. This description covers an extension of known asymptotic hydrodynamics...
In the absence of dislocations, the hydrodynamics of two-dimensional crystals can be accounted for by considering a set of 1-form global symmetries. In thermal equilibrium, the holographic dual to such a crystal is an AdS black brane charged under 2-form gauge fields. By extending the fluid-gravity correspondence to such backgrounds we obtain both dissipative and non-dissipative transport...
In this talk, I will present a model describing the spatially random coupling between a fermi surface and a bosonic vector field. Its transport properties will be shown to illustrate if spatial randomness could be the mechanism under the strange metals.
Studying the thermal QCD phase transition and the critical endpoint is crucial for understanding the hot environment relevant to the initial stage of heavy-ion collisions and the early universe. The nature of the QCD chiral phase transition in the limit of massless quarks has been a longstanding, open problem. The discrepancy between the lattice QCD estimation and the effective model results...
In this presentation, we will discuss the QCD phase diagram at finite temperature and baryon chemical potential obtained from an AdS/QCD hardwall model. The novelty of our work is to obtain solutions that represent the strongly interacting nuclear matter by applying boundary conditions derived from NJL and Van der Waals-type equations of state. Further, we investigate the possibility of...
