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Dynamical instabilities and transient short-range order in the fermionic Hubbard model
Johannes Bauer, Mehrtash Babadi, Eugene Demler
We study the dynamics of magnetic correlations in the half-filled fermionic Hubbard model following a fast ramp of the repulsive interaction. We use Schwinger-Keldysh self-consiste…
Renormalization group approach to the Fröhlich polaron model: application to impurity-BEC problem
F. Grusdt, Y. E. Shchadilova, A. N. Rubtsov +1
We develop a renormalization group approach for analyzing Fröhlich polarons and apply it to a problem of impurity atoms immersed in a Bose-Einstein condensate of ultra cold atoms.…
Bloch oscillations of bosonic lattice polarons
Fabian Grusdt, Aditya Shashi, Dmitry Abanin +1
We consider a single impurity atom confined to an optical lattice and immersed in a homogeneous Bose-Einstein condensate (BEC). Interaction of the impurity with the phonon modes of…
Polaronic mass renormalization of impurities in BEC: correlated Gaussian wavefunction approach
Yulia E. Shchadilova, Fabian Grusdt, Alexey N. Rubtsov +1
We propose a class of variational Gaussian wavefunctions to describe Fröhlich polarons at finite momenta. Our wavefunctions give polaron energies that are in excellent agreement wi…
Exploring dynamical phase transitions and prethermalization with quantum noise of excitations
Pietro Smacchia, Michael Knap, Eugene Demler +1
Dynamical phase transitions can occur in isolated quantum systems that are brought out of equilibrium by sudden parameter changes. We discuss the characterization of such dynamical…
Anomalous diffusion and Griffiths effects near the many-body localization transition
Kartiek Agarwal, Sarang Gopalakrishnan, Michael Knap +2
We explore the high-temperature dynamics of the disordered, one-dimensional XXZ model near the many-body localization (MBL) transition, focusing on the delocalized (i.e., "metallic…