6 papers
High-temperature transport and polaron speciation in the anharmonic Holstein model
Attila Szabó, S. A. Parameswaran, Sarang Gopalakrishnan
We study the finite-temperature transport of electrons coupled to anharmonic local phonons. Our focus is on the high-temperature incoherent regime, where controlled calculations ar…
Neural network wave functions and the sign problem
Attila Szabó, Claudio Castelnovo
Neural quantum states (NQS) are a promising approach to study many-body quantum physics. However, they face a major challenge when applied to lattice models: Convolutional networks…
Mixed spectra and partially extended states in a two-dimensional quasiperiodic model
Attila Szabó, Ulrich Schneider
We introduce a two-dimensional generalisation of the quasiperiodic Aubry-André model. Even though this model exhibits the same duality relation as the one-dimensional version, its…
Generalised route to effective field theories for quantum systems with local constraints
Attila Szabó, Garry Goldstein, Claudio Castelnovo +1
Some of the exciting phenomena uncovered in strongly correlated systems in recent years - for instance quantum topological order, deconfined quantum criticality, and emergent gauge…
Seeing beyond the light: Vison and photon electrodynamics in quantum spin ice
Attila Szabó, Claudio Castelnovo
Understanding the nature and behaviour of excitations in quantum spin liquids, and in topological phases of matter in general, is of fundamental importance and has proven crucial f…
Non-power-law universality in one-dimensional quasicrystals
Attila Szabó, Ulrich Schneider
We have investigated scaling properties of the Aubry-André model and related one-dimensional quasiperiodic Hamiltonians near their localisation transitions. We find numerically tha…