Victor Galitski
University of Maryland, College Park
Magnetic fieldPhysicsTopologyTopological insulatorLattice (order)QuasiparticlePairingElectronHamiltonian (quantum mechanics)Materials scienceSuperfluidityCondensed matter physicsQuantum electrodynamicsFermionSuperconductivityQuantum mechanicsKondo insulatorClassical mechanicsSpin-½Quantum
317Publications
39H-index
6,426Citations
Publications 289
Newest
#1Alec CaoH-Index: 2
#2Roshan SajjadH-Index: 5
Last. David WeldH-Index: 16
view all 10 authors...
Quantum interference can terminate energy growth in a continually kicked system, via a single-particle ergodicity-breaking mechanism known as dynamical localization. The effect of many-body interactions on dynamically localized states, while important to a fundamental understanding of quantum decoherence, has remained unexplored despite a quarter-century of experimental studies. We report the experimental realization of a tunably-interacting kicked quantum rotor ensemble using a Bose-Einstein co...
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Ergodicity is a fundamental principle of statistical mechanics underlying the behavior of generic quantum many-body systems. However, how this universal many-body quantum chaotic regime emerges due to interactions remains largely a puzzle. This paper demonstrates using both heuristic arguments and a microscopic calculation that a dephasing mechanism, similar to Altshuler-Aronov-Khmelnitskii dephasing in the theory of localization, underlies this transition to chaos. We focus on the behavior of t...
Twisted bilayer graphene is a rich condensed matter system, which allows to tune energy scales and electronic correlations. The low-energy physics of the resulting Moire structure can be mathematically described in terms of a diffeomorphism in a continuum formulation. We point out that twisting is just one example of Moire diffeomorphisms. Another particularly simple and experimentally relevant transformation is a homogeneous isomorphic strain of one of the layers, which gives rise to a nearly-i...
Kondo lattice models have established themselves as an ideal platform for studying the interplay between topology and strong correlations such as in topological Kondo insulators or Weyl-Kondo semimetals. The nature of these systems requires the use of non-perturbative techniques which are few in number, especially in high dimensions. Motivated by this we study a model of Dirac fermions in 3+1dimensions coupled to an arbitrary array of spins via a generalization of functional non-Abelian boson...
Reflectionless potentials play an important role in constructing exact solutions to classical dynamical systems, non-perturbative solutions of various large-N field theories, and closely related solitonic solutions to the Bogoliubov-de Gennes equations in the theory of superconductivity. These solutions rely on the inverse scattering method, which reduces these seemingly unrelated problems to identifying reflectionless potentials of an auxiliary one-dimensional quantum scattering problem. There ...
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#1Lata Kh JoshiH-Index: 7
#2Andreas ElbenH-Index: 13
Last. Peter ZollerH-Index: 158
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The spectral form factor (SFF), characterizing statistics of energy eigenvalues, is a key diagnostic of many-body quantum chaos. In addition, partial spectral form factors (pSFFs) can be defined which refer to subsystems of the many-body system. They provide unique insights into energy eigenstate statistics of many-body systems, as we show in an analysis on the basis of random matrix theory and of the eigenstate thermalization hypothesis. We propose a protocol which allows the measurement of SFF...
#1Alec CaoH-Index: 2
#2Roshan SajjadH-Index: 5
Last. David WeldH-Index: 16
view all 10 authors...
While ergodicity is a fundamental postulate of statistical mechanics and implies that driven interacting systems inevitably heat, ergodic dynamics can be disrupted by quantum interference. Despite a quarter-century of experimental studies, the effect of many-body interactions on the resulting dynamically localized state has remained unexplored. We report the experimental realization of a tunably-interacting kicked quantum rotor ensemble using a Bose-Einstein condensate in a pulsed optical lattic...
#1Jonathan B. Curtis (Harvard University)H-Index: 4
#2Andrey GrankinH-Index: 8
Last. Eugene DemlerH-Index: 102
view all 6 authors...
Cavity control of quantum matter may offer new ways to study and manipulate many-body systems. A particularly appealing idea is to use cavities to enhance superconductivity, especially in unconventional or high-T_csystems. Motivated by this, we propose a scheme for coupling Terahertz resonators to the antiferromagnetic fluctuations in a cuprate parent compound, which are believed to provide the glue for Cooper pairs in the superconducting phase. First, we derive the interaction between magnon...
#1Colin Rylands (UMD: University of Maryland, College Park)H-Index: 9
#2Emil A. Yuzbashyan (RU: Rutgers University)H-Index: 24
Last. Victor Galitski (UMD: University of Maryland, College Park)H-Index: 39
view all 5 authors...
Abstract null null Non-analyticities in the logarithm of the Loschmidt echo, known as dynamical quantum phase transitions [DQPTs], are a recently introduced attempt to classify the myriad of possible phenomena which can occur in far from equilibrium closed quantum systems. In this work, we analytically investigate the Loschmidt echo in nonequilibrium null null null s null null -wave and topological null null null null null null p null null null x null null null + null i null null null p null nul...
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The chiral anomaly is a fundamental quantum mechanical phenomenon which is of great importance to both particle physics and condensed matter physics alike. In the context of QED it manifests as the breaking of chiral symmetry in the presence of electromagnetic fields. It is also known that anomalous chiral symmetry breaking can occur through interactions alone, as is the case for interacting one dimensional systems. In this paper we investigate the interplay between these two modes of anomalous ...
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