130 citations · 1.9k across the 80 of their papers we have counts for
7 papers · 1 filter
Phonon-induced quantum ratchet in the exciton spin dynamics in diluted magnetic semiconductors in a magnetic field
Florian Ungar, Moritz Cygorek, Vollrath Martin Axt
Magnetically doped semiconductors are well known for their giant Zeeman splittings which can reach several meV even in relatively small external magnetic fields. After preparing a…
Phonon impact on the dynamics of resonantly excited and hot excitons in diluted magnetic semiconductors
Florian Ungar, Moritz Cygorek, Vollrath Martin Axt
Phonons are well known to be the main mechanism for the coupling between bright and dark excitons in nonmagnetic semiconductors. Here, we investigate diluted magnetic semiconductor…
Many-body correlations brought to light in absorption spectra of diluted magnetic semiconductors
Florian Ungar, Moritz Cygorek, Vollrath Martin Axt
Diluted magnetic semiconductors are materials well known to exhibit strong correlations which typically manifest in carrier-mediated magnetic ordering. In this Rapid Communication,…
Path-integral approach for nonequilibrium multi-time correlation functions of open quantum systems coupled to Markovian and non-Markovian environments
Michael Cosacchi, Moritz Cygorek, Florian Ungar +3
Using a real-time path integral approach we develop an algorithm to calculate multi-time correlation functions of open few-level quantum systems that is applicable to highly nonequ…
Persistent oscillations of the order parameter and interaction quench phase diagram for a confined Bardeen-Cooper-Schrieffer Fermi gas
S. Hannibal, P. Kettmann, M. D. Croitoru +2
We present a numerical study of the interaction quench dynamics in a superfluid ultracold Fermi gas confined in a three-dimensional cigar-shaped harmonic trap. In the present paper…
Dynamical vanishing of the order parameter in a confined Bardeen-Cooper-Schrieffer Fermi gas after an interaction quench
S. Hannibal, P. Kettmann, M. D. Croitoru +2
We present a numerical study of the Higgs mode in an ultracold confined Fermi gas after an interaction quench and find a dynamical vanishing of the superfluid order parameter. Our…