Condensed Matter Theory: publications

Active forces in confluent cell monolayers

Authors:

Guanming Zhang, Julia M Yeomans

Activity pulses induce spontaneous flow reversals in viscoelastic environments

Authors:

Emmanuel LC VI M Plan, Julia M Yeomans, Amin Doostmohammadi

An active torque dipole across tissue layers drives avian left-right symmetry breaking

Authors:

Julia Pfanzelter, Jonas Neipel, Adrian A Lahola-Chomiak, Nikoloz Tsikolia, Alexander Mietke, Jerome Gros, Frank Jülicher, Stephan W Grill

Anomalous gapped boundaries between surface topological orders in higher-order topological insulators and superconductors with inversion symmetry

Physical Review B: Condensed Matter and Materials Physics American Physical Society

Authors:

Ming-Hao Li, Titus Neupert, SA Parameswaran, Apoorv Tiwari

Asymptotically exact theory for nonlinear spectroscopy of random quantum magnets

Physical Review Letters American Physical Society

Authors:

Sa Parameswaran, Sarang Gopalakrishnan

Abstract:

We study nonlinear response in quantum spin systems near in nite-randomness critical points. Nonlinear dynamical probes, such as two-dimensional (2D) coherent spectroscopy, can diagnose the nearly localized character of excitations in such systems. We present exact results for nonlinear response in the 1D random transverse- eld Ising model, from which we extract information about critical behavior that is absent in linear response. Our analysis yields exact scaling forms for the distribution functions of relaxation times that result from realistic channels for dissipation in random magnets. We argue that our results capture the scaling of relaxation times and nonlinear response in generic random quantum magnets in any spatial dimension

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