A bstract According to holography, entanglement is the building block of spacetime; therefore, drastic changes will lead interesting transitions in dual spacetime. In this paper, we study effect projective measurements on Sachdev-Ye-Kitaev (SYK) model’s thermofield double state, an eternal black hole Jackiw-Teitelboim (JT) gravity. We calculate (Renyi-2) mutual information between two copies SY...

Abstract We present and discuss two exact, but perhaps unfamiliar, representations of thermal radiation. The first has the form a superposition quantum vacuum stochastic classical field second is pure-state thermofield representation introduced by Takahashi Umezawa. It interesting that former is, essentially, opposite Planck’s original conception blackbody

We discuss numerically the nonperturbative effects in exponential random graphs which are analogue of eigenvalue instantons matrix models. The phase structure with chemical potential for ${C}_{4}$ ${\ensuremath{\mu}}_{4}$ and degree preserving constraint is clarified. first order transition at critical value ${\ensuremath{\mu}}_{4}^{\mathrm{RRG}}$ into bipartite a formation fixed number cluster...

We study entanglement in thermofield double states of strongly coupled CFTs by analyzing two-sided Reissner-Nordström solutions in AdS. The central object of study is the mutual information between a pair of regions, one on each asymptotic boundary of the black hole. For large regions the mutual information is positive and for small ones it vanishes; we compute the critical length scale, which ...

Abstract In this paper, we first construct thermofield double states for bosonic string theory in the light-cone gauge. We then obtain a coherent-thermal state and thermal-coherent state. use covariance matrix approach to calculate circuit complexity of states. approach, generate optimal geodesics by horizontal generator, using length minimal group manifold.

A bstract We investigate the time evolution of odd entanglement entropy (OEE) and logarithmic negativity (LN) for thermofield double (TFD) states in free scalar quantum field theories using covariance matrix approach. To have mixed states, we choose non-complementary subsystems, either adjacent or disjoint intervals on each side TFD. find that pattern OEE is a linear growth followed by saturati...