30 citations · 88 across the 9 of their papers we have counts for
9 papers
Feshbach modulation spectroscopy
A. Dirks, K. Mikelsons, H. R. Krishnamurthy +1
In the vicinity of a Feshbach resonance, a system of ultracold atoms on an optical lattice undergoes rich physical transformations which involve molecule formation and hopping of m…
Simulation of inhomogeneous distributions of ultracold atoms in an optical lattice via a massively parallel implementation of nonequilibrium strong-coupling perturbation theory
A. Dirks, K. Mikelsons, H. R. Krishnamurthy +1
We present a nonequilibrium strong-coupling approach to inhomogeneous systems of ultracold atoms in optical lattices. We demonstrate its application to the Mott-insulating phase of…
Theoretical Description of Coherent Doublon Creation via Lattice Modulation Spectroscopy
A. Dirks, K. Mikelsons, H. R. Krishnamurthy +1
Using a recently developed strong-coupling method, we present a comprehensive theory for doublon production processes in modulation spectroscopy of a three-dimensional system of ul…
Double Occupancy and Magnetic Susceptibility of the Anderson Impurity Model out of Equilibrium
A. Dirks, S. Schmitt, J. E. Han +3
We use different numerical approaches to calculate the double occupancy and mag- netic susceptibility as a function of a bias voltage in an Anderson impurity model. Specifically, w…
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…
Imaginary-time quantum many-body theory out of equilibrium II: Analytic continuation of dynamic observables and transport properties
Andreas Dirks, Jong E. Han, Mark Jarrell +1
Within the imaginary-time theory for nonequilibrium in quantum dot systems the calculation of dynamical quantities like Green's functions is possible via a suitable quantum Monte-C…