Physics Department, Princeton University

Condensed Matter Seminar - Tarun Grover, KITP UCSB - Highly Entangled Quantum Matter
Abstract: Strong correlations can lead to new phases of quantum matter with striking features, such as emergent fermions and photons in a system composed only of bosons, or even excitations that are neither bosons nor fermions ("anyons"). In this talk, I will illustrate the unique view provided by many-body quantum entanglement on such intriguing phases. In particular, I will show that the quantum entanglement can be used to extract the universal properties associated with anyons, including their braiding statistics. I will also explain how one may exploit recently discovered constraints on the renormalization group flows, such as entanglement monotonicity, to determine the stability of phases which are described by interacting gauge theories in three space-time dimensions.
Jadwin A07  ·  1:15 p.m.– 2:30 p.m.

High Energy Theory Seminar - Bo Sundborg, Stockholm University - Singularities in three-dimensional gravity
Singular geometries are important in 3d gravity. For example, conical singularities represent point particles. There are also more surprising examples that appear naturally in 3d gravity theories. I discuss them in the hope that they will shed light on puzzling issues such as black hole micro-state counting and the existence of minimal quantum gravity theories with a classical limit. Similar solutions arise in the Chern-Simons formulation, in higher spin gravity and in multigravity theories.
PCTS Seminar Room  ·  1:30 p.m.– 3:00 p.m.