11 papers
Symmetry Enhancement, SPT Absorption, and Duality in QED
Shai M. Chester, Zohar Komargodski
Quantum Electrodynamics in 2+1 dimensions (QED) with two Dirac fermions displays time reversal symmetry, nontrivial SPT phases and anomalies. The fate of this theory in its str…
Temperature-Resistant Order in 2+1 Dimensions
Zohar Komargodski, Fedor K. Popov
High temperatures are typically thought to increase disorder. Here we examine this idea in Quantum Field Theory in 2+1 dimensions. For this sake we explore a novel class of tractab…
Minimal Models of Entropic Order
Xiaoyang Huang, Zohar Komargodski, Andrew Lucas +2
Due to entropic effects, it is possible that generic high-energy states of a quantum or classical system are ordered. This leads to spontaneous symmetry breaking at arbitrarily hig…
Trapping Flux in Metals
Zohar Komargodski, Fedor K. Popov
We report on a new flux quantization phenomenon in metals. We study the response of normal metals to the presence of localized magnetic flux. We find that, due to backreaction effe…
Defect Anomalies, a Spin-Flux Duality, and Boson-Kondo Problems
Zohar Komargodski, Fedor K. Popov, Brandon C. Rayhaun
We show that the infrared phases of certain line defects in 2+1d quantum field theories are determined by anomalies, including anomalies in the space of defect coupling constants,…
Disclinations, dislocations, and emanant flux at Dirac criticality
Maissam Barkeshli, Christopher Fechisin, Zohar Komargodski +1
What happens when fermions hop on a lattice with crystalline defects? The answer depends on topological quantum numbers which specify the action of lattice rotations and translatio…