A major open question in studies of nonequilibrium quantum dynamics is the identification of
the time scales involved in the relaxation process of isolated quantum systems that have …

We propose a new diagnostic for quantum chaos. We show that the time evolution of
complexity for a particular type of target state can provide equivalent information about the …

A bstract In this paper we revisit the double cone wormhole introduced by Saad, Shenker
and Stanford (SSS), which was shown to reproduce the ramp in the spectral form factor. As a …

A bstract Collective behavior strongly influences the charging dynamics of quantum batteries
(QBs). Here, we study the impact of nonlocal correlations on the energy stored in a system of …

A long period of linear growth in the spectral form factor provides a universal diagnostic of
quantum chaos at intermediate times. By contrast, the behavior of the spectral form factor in …

We study a sparse Sachdev-Ye-Kitaev (SYK) model with N Majoranas where only∼ k N
independent matrix elements are nonzero. We identify a minimum k≳ 1 for quantum chaos …

A bstract We study the behaviour of extremal and near-extremal black holes at low energies
and low temperatures and find that it can be understood from the near-horizon AdS 2 region …

One manifestation of quantum chaos is a random-matrix-like fine-grained energy spectrum.
Prior to the inverse level spacing time, random matrix theory predicts a “ramp” of increasing …

A bstract The exact 2-point function of certain physically motivated operators in SYK-like spin
glass models is computed, bypassing the Schwinger-Dyson equations. The models possess …

We consider a noninteracting many-fermion system populating levels of a unitary random
matrix ensemble (equivalent to the q= 2 complex Sachdev-Ye-Kitaev model)—a generic …