3 papers
cond-mat.str-el2020
Large Classes of Quantum Scarred Hamiltonians from Matrix Product States
Sanjay Moudgalya, Edward O'Brien, B. Andrei Bernevig +2
Motivated by the existence of exact many-body quantum scars in the AKLT chain, we explore the connection between Matrix Product State (MPS) wavefunctions and many-body quantum scar…
cond-mat.stat-mech2019
The "not-A", RSPT and Potts phases in an -invariant chain
Edward O'Brien, Eric Vernier, Paul Fendley
We analyse in depth an -invariant nearest-neighbor quantum chain in the region of a U(1)-invariant self-dual multicritical point. We find four distinct proximate gapped phases…
cond-mat.stat-mech2018
Onsager symmetries in -invariant clock models
Eric Vernier, Edward O'Brien, Paul Fendley
We show how the Onsager algebra, used in the original solution of the two-dimensional Ising model, arises as an infinite-dimensional symmetry of certain self-dual models that also…