3 papers
quant-ph2020
Free fermions behind the disguise
Samuel J. Elman, Adrian Chapman, Steven T. Flammia
An invaluable method for probing the physics of a quantum many-body spin system is a mapping to noninteracting effective fermions. We find such mappings using only the frustration…
quant-ph2020
Characterization of solvable spin models via graph invariants
Adrian Chapman, Steven T. Flammia
Exactly solvable models are essential in physics. For many-body spin-1/2 systems, an important class of such models consists of those that can be mapped to free fermions hopping on…
quant-ph2018
Many-body-localization transition in a universal quantum circuit model
Adrian Chapman, Akimasa Miyake
The dynamical generation of complex correlations in quantum many-body systems is of renewed interest in the context of quantum chaos, where the out-of-time-ordered (OTO) correlatio…