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Quantum Many-Body Scars: A Quasiparticle Perspective
Anushya Chandran, Thomas Iadecola, Vedika Khemani +1
Weakly interacting quasiparticles play a central role in the low-energy description of many phases of quantum matter. At higher energies, however, quasiparticles cease to be well-d…
Dynamical correlations and domain wall relocalization in transverse field Ising chains
Philippe Suchsland, Benoît Douçot, Vedika Khemani +1
We study conventional and out-of-time-ordered correlators (OTOCs) for a wide variety of transverse field Ising chains: classical and quantum, clean and disordered, and integrable a…
Comment on "Quantum Time Crystals from Hamiltonians with Long-Range Interactions"
Vedika Khemani, Roderich Moessner, S. L. Sondhi
In a recent paper (Phys. Rev. Lett. 123, 210602), Kozin and Kyriienko claim to realize "genuine" ground state time crystals by studying models with long-ranged and infinite-body in…
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…
A Brief History of Time Crystals
Vedika Khemani, Roderich Moessner, S. L. Sondhi
The idea of breaking time-translation symmetry has fascinated humanity at least since ancient proposals of the perpetuum mobile. Unlike the breaking of other symmetries, such as sp…
Signatures of integrability in the dynamics of Rydberg-blockaded chains
Vedika Khemani, Chris R. Laumann, Anushya Chandran
A recent experiment on a 51-atom Rydberg blockaded chain observed anomalously long-lived temporal oscillations of local observables after quenching from an antiferromagnetic initia…
Efficient variational diagonalization of fully many-body localized Hamiltonians
Frank Pollmann, Vedika Khemani, J. Ignacio Cirac +1
We introduce a unitary matrix-product operator (UMPO) based variational method that approximately finds all the eigenstates of fully many-body localized (fMBL) one-dimensional Hami…
How universal is the entanglement spectrum?
Anushya Chandran, Vedika Khemani, S. L. Sondhi
It is now commonly believed that the ground state entanglement spectrum (ES) exhibits universal features characteristic of a given phase. In this letter, we show that this belief i…
Many-body Localization and Symmetry Protected Topological Order
Anushya Chandran, Vedika Khemani, C. R. Laumann +1
Recent work shows that highly excited many-body localized eigenstates can exhibit broken symmetries and topological order, including in dimensions where such order would be forbidd…
Kibble-Zurek Scaling and String-Net Coarsening in Topologically Ordered Systems
Anushya Chandran, F. J. Burnell, Vedika Khemani +1
We consider the non-equilibrium dynamics of topologically ordered systems driven across a continuous phase transition into proximate phases with no, or reduced, topological order.…