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14 papers · 1 filter
Deconstructing the Hubbard Hamiltonian by Ultrafast Quantum Modulation Spectroscopy in Solid-state Mott Insulators
S. Kaiser, S. R. Clark, D. Nicoletti +8
Most available theories for correlated electron transport are based on the Hubbard Hamiltonian. In this effective theory, renormalized hopping and interaction parameters only impli…
Dielectric breakdown of Mott insulators -- doublon production and doublon heating
Martin Eckstein, Philipp Werner
Using dynamical mean-field theory and the non-crossing approximation as impurity solver, we study the response of a Mott insulator to strong dc electric fields. The breakdown of th…
Strategies for enhancing quantum entanglement by local photon subtraction
Tim J. Bartley, Philip J. D. Crowley, Animesh Datta +3
Subtracting photons from a two-mode squeezed state is a well-known method to increase entanglement. We analyse different strategies of local photon subtraction from a two-mode sque…
Extracting spectral properties from Keldysh Green functions
Andreas Dirks, Martin Eckstein, Thomas Pruschke +1
We investigate the possibility to assist the numerically ill-posed calculation of spectral properties of interacting quantum systems in thermal equilibrium by extending the imagina…
Nonthermal antiferromagnetic order and nonequilibrium criticality in the Hubbard model
Naoto Tsuji, Martin Eckstein, Philipp Werner
We study dynamical phase transitions from antiferromagnetic to paramagnetic states driven by an interaction quench in the fermionic Hubbard model using the nonequilibrium dynamical…
Nonthermal symmetry broken states in the strongly interacting Hubbard model
Philipp Werner, Naoto Tsuji, Martin Eckstein
We study the time evolution of the antiferromagnetic order parameter after interaction quenches in the Hubbard model. Using the nonequilibrium dynamical mean field formalism, we sh…