Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Frank, Régine"'
Autor:
Lubatsch, Andreas, Frank, Regine
Publikováno v:
Appl. Sci. 10(5), 1836 (2020)
We implement externally excited ZnO Mie resonators in a framework of a generalized Hubbard Hamiltonian to investigate the lifetimes of excitons and exciton-polaritons out of thermodynamical equilibrium. Our results are derived by a Floquet-Keldysh-Gr
Externí odkaz:
http://arxiv.org/abs/2003.00793
Autor:
Lubatsch, Andreas, Frank, Regine
Publikováno v:
Phys. Rev. Research 2, 013324 (2020)
We present a quantum field theoretical method for the characterization of disordered complex media with short laser pulses in an optical coherence tomography setup (OCT). We solve this scheme of coherent transport in space and time with weighted esse
Externí odkaz:
http://arxiv.org/abs/2001.02742
Autor:
Lubatsch, Andreas, Frank, Regine
Publikováno v:
Symmetry 11 (10), 1246 (2019)
Spatially uniform optical excitations can induce Floquet topological band structures within insulators which can develop similar or equal characteristics as are known from three-dimensional topological insulators. We derive in this article theoretica
Externí odkaz:
http://arxiv.org/abs/1909.11634
Autor:
Lubatsch, Andreas, Frank, Regine
Publikováno v:
EPJ B 10.1140/epjb/e2019-100087-0
Spatially uniform excitations can induce Floquet topological bandstructures within insulators which have equal characteristics to those of topological insulators. Going beyond we demonstrate in this article the evolution of Floquet topological quantu
Externí odkaz:
http://arxiv.org/abs/1909.06922
Autor:
Lubatsch, Andreas, Frank, Regine
Publikováno v:
Appl. Sci. 2019, 9, 2477 (2019)
The spatial formation of coherent random laser modes in strongly scattering disordered random media is a central feature in the understanding of the physics of random lasers. We derive a quantum field theoretical method for random lasing in disordere
Externí odkaz:
http://arxiv.org/abs/1509.01873
Autor:
Lubatsch, Andreas, Frank, Regine
Publikováno v:
Scientific Reports 5, 1700 (2015)
We report the theoretical analysis for tuning the quantum efficiency of solid state random lasers. Vollhardt-Woelfle theory of photonic transport in disordered non-conserving and open random media, is coupled to lasing dynamics and solved positionall
Externí odkaz:
http://arxiv.org/abs/1505.06781
Autor:
Lubatsch, Andreas, Frank, Regine
We present Floquet-Keldysh non-equilibrium dynamical mean field calculations (DMFT) with an iterative perturbative solver (IPT) for high pump-power induced Stark states yielding a closing gap within semiconductor bulk and nano-cavities. Our model pre
Externí odkaz:
http://arxiv.org/abs/1504.00949
Autor:
Maret, Georg, Sperling, Tilo, Bührer, Wolfgang, Lubatsch, Andreas, Frank, Regine, Aegerter, Christof M.
Publikováno v:
Nature Photonics 7, 934-935 (2013)
The interplay between nonlinear effects and Anderson localization in disordered optical fibres1 has recently attracted great interest, and it is important in the action of random lasers in which closed multiple scattering loops have enhanced intensit
Externí odkaz:
http://arxiv.org/abs/1401.5461
Autor:
Frank, Regine
Publikováno v:
Applied Physics B 113, 41- 47 (2013)
A gas of ultracold interacting quantum degenerate Fermions is considered in a three dimensional optical lattice which is externally modulated in the fre- quency and the amplitude. This theoretical study utilizes the Keldysh formalism to account for t
Externí odkaz:
http://arxiv.org/abs/1306.3720
Autor:
Lubatsch, Andreas, Frank, Regine
Publikováno v:
AIP Conf. Proc. 1610 (2014)
We report a quantum field theoretical description of light transport and random lasing. The Bethe-Salpeter equation is solved including maximally crossed diagrams and non-elastic scattering. This is the first theoretical framework that combines so ca
Externí odkaz:
http://arxiv.org/abs/1209.4552