475 citations · 3.1k across the 42 of their papers we have counts for
42 papers
Signatures of fractional statistics in nonlinear pump-probe spectroscopy
Max McGinley, Michele Fava, S. A. Parameswaran
We show that the presence of anyons in the excitation spectrum of a two-dimensional system can be inferred from nonlinear spectroscopic quantities. In particular, we consider pump-…
Multiversality and Unnecessary Criticality in One Dimension
Abhishodh Prakash, Michele Fava, S. A. Parameswaran
We present microscopic models of spin ladders which exhibit continuous critical surfaces whose properties and existence, unusually, cannot be inferred from those of the flanking ph…
Divergent nonlinear response from quasiparticle interactions
Michele Fava, Sarang Gopalakrishnan, Romain Vasseur +2
We demonstrate that nonlinear response functions in many-body systems carry a sharp signature of interactions between gapped low-energy quasiparticles. Such interactions are challe…
Spin skyrmion gaps as signatures of strong-coupling insulators in magic-angle twisted bilayer graphene
Jiachen Yu, Benjamin A. Foutty, Yves H. Kwan +6
The flat electronic bands in magic-angle twisted bilayer graphene (MATBG) host a variety of correlated insulating ground states, many of which are predicted to support charged exci…
Absolutely Stable Spatiotemporal Order in Noisy Quantum Systems
Max McGinley, Sthitadhi Roy, S. A. Parameswaran
We introduce a model of non-unitary quantum dynamics that exhibits infinitely long-lived discrete spatiotemporal order robust against any unitary or dissipative perturbation. Ergod…
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…
Beyond the Freshman's Dream: Classical fractal spin liquids from matrix cellular automata in three-dimensional lattice models
Sounak Biswas, Yves H. Kwan, S. A. Parameswaran
We construct models hosting classical fractal spin liquids on two realistic three-dimensional (3D) lattices of corner-sharing triangles: trillium and hyperhyperkagome (HHK). Both m…
One-Dimensional Luttinger Liquids in a Two-Dimensional Moiré Lattice
Pengjie Wang, Guo Yu, Yves H. Kwan +13
The Luttinger liquid (LL) model of one-dimensional (1D) electronic systems provides a powerful tool for understanding strongly correlated physics including phenomena such as spin-c…
Kekulé spiral order at all nonzero integer fillings in twisted bilayer graphene
Yves H. Kwan, Glenn Wagner, Tomohiro Soejima +4
We study magic angle graphene in the presence of both strain and particle-hole symmetry breaking due to non-local inter-layer tunneling. We perform a self-consistent Hartree-Fock s…
Hydrodynamic non-linear response of interacting integrable systems
Michele Fava, Sounak Biswas, Sarang Gopalakrishnan +2
We develop a formalism for computing the non-linear response of interacting integrable systems. Our results are asymptotically exact in the hydrodynamic limit where perturbing fiel…
Theory of competing excitonic orders in insulating WTe monolayers
Yves H. Kwan, T. Devakul, S. L. Sondhi +1
We develop a theory of the excitonic phase recently proposed as the zero-field insulating state observed near charge neutrality in monolayer WTe. Using a Hartree-Fock approxima…
Superuniversality from disorder at two-dimensional topological phase transitions
Byungmin Kang, S. A. Parameswaran, Andrew C. Potter +2
We investigate the effects of quenched randomness on topological quantum phase transitions in strongly interacting two-dimensional systems. We focus first on transitions driven by…
Asymptotically exact theory for nonlinear spectroscopy of random quantum magnets
S. A. Parameswaran, Sarang Gopalakrishnan
We study nonlinear response in quantum spin systems {near infinite-randomness critical points}. Nonlinear dynamical probes, such as two-dimensional (2D) coherent spectroscopy, can…
Spin crossovers and superdiffusion in the one-dimensional Hubbard model
Michele Fava, Brayden Ware, Sarang Gopalakrishnan +2
We use tools from integrability and generalized hydrodynamics to study finite-temperature dynamics in the one-dimensional Hubbard model. First, we examine charge, spin, and energy…
Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNbO
Michele Fava, Radu Coldea, S. A. Parameswaran
We construct a microscopic spin-exchange Hamiltonian for the quasi-1D Ising magnet CoNbO that captures detailed and hitherto-unexplained aspects of its dynamic spin structu…
Distinguishing localization from chaos: challenges in finite-size systems
D. A. Abanin, J. H. Bardarson, G. De Tomasi +7
We re-examine attempts to study the many-body localization transition using measures that are physically natural on the ergodic/quantum chaotic regime of the phase diagram. Using s…
Twisted bilayer graphene in a parallel magnetic field
Yves H. Kwan, S. A. Parameswaran, S. L. Sondhi
We study the effect of an in-plane magnetic field on the non-interacting dispersion of twisted bilayer graphene. Our analysis is rooted in the chirally symmetric continuum model, w…
Dynamics and Transport at the Threshold of Many-Body Localization
Sarang Gopalakrishnan, S. A. Parameswaran
Many-body localized (MBL) systems do not approach thermal equilibrium under their intrinsic dynamics; MBL and conventional thermalizing systems form distinct dynamical phases of ma…
Interacting multi-channel topological boundary modes in a quantum Hall valley system
Mallika T. Randeria, Kartiek Agarwal, Benjamin E. Feldman +6
Symmetry and topology play key roles in the identification of phases of matter and their properties. Both concepts are central to understanding quantum Hall ferromagnets (QHFMs), t…
Classical Dimers on Penrose Tilings
Felix Flicker, Steven H. Simon, S. A. Parameswaran
We study the classical dimer model on rhombic Penrose tilings, whose edges and vertices may be identified with those of a bipartite graph. We find that Penrose tilings do not admit…
Signatures of information scrambling in the dynamics of the entanglement spectrum
Tibor Rakovszky, Sarang Gopalakrishnan, S. A. Parameswaran +1
We examine the time evolution of the entanglement spectrum of a small subsystem of a non-integrable spin chain following a quench from a product state. We identify signatures in th…
Kosterlitz-Thouless scaling at many-body localization phase transitions
Philipp T. Dumitrescu, Anna Goremykina, Siddharth A. Parameswaran +2
We propose a scaling theory for the many-body localization (MBL) phase transition in one dimension, building on the idea that it proceeds via a 'quantum avalanche'. We argue that t…
Floquet Quantum Criticality
William Berdanier, Michael Kolodrubetz, S. A. Parameswaran +1
We study transitions between distinct phases of one-dimensional periodically driven (Floquet) systems. We argue that these are generically controlled by infinite-randomness fixed p…
Many-body localization, symmetry, and topology
S. A. Parameswaran, Romain Vasseur
We review recent developments in the study of out-of-equilibrium topological states of matter in isolated systems. The phenomenon of many-body localization, exhibited by some isola…