This is a review of the Sachdev-Ye-Kitaev (SYK) model of compressible quantum many-
body systems without quasiparticle excitations, and its connections to various theoretical …

The bumblebee gravity model, with a vector field nonminimally coupled to gravity, is a
natural extension of the Einstein-Maxwell theory. In this theory, a black hole can carry a …

Strange metals—ubiquitous in correlated quantum materials—transport electrical charge at
low temperatures but not by the individual electronic quasiparticle excitations, which carry …

The two-dimensional Yukawa-Sachdev-Ye-Kitaev (2D-YSYK) model provides a universal
theory of quantum phase transitions in metals in the presence of quenched random spatial …

Complex many-particle quantum entanglement is a central theme in two distinct major topics
in physics: the strange metal state found in numerous correlated electron compounds, and …

We study electrical transport at quantum critical points (QCPs) associated with loop current
ordering in a metal, focusing specifically on models of the" Hertz-Millis" type. At the infrared …

We study a controlled large-N theory of electrons coupled to dynamical two-level systems
(TLSs) via spatially random interactions. Such a physical situation arises when electrons …

We study thermalization dynamics in a fermion-phonon variant of the Sachdev-Ye-Kitaev
model coupled to an external cold thermal bath of harmonic oscillators. We find that …

The emergence of fractonic topological phases and novel universality classes for quantum
dynamics highlights the importance of dipolar symmetry in condensed matter systems. In this …

We study the optical conductivity of a pristine two-dimensional electron system near an Ising-
nematic quantum critical point. We discuss the relation between the frequency scaling of the …