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57 papers · 1 filter
Exotic roton excitations in quadrupolar Bose-Einstein condensates
M. Lahrz, Mikhail Lemeshko, L. Mathey
We investigate the occurrence of rotons in a quadrupolar Bose-Einstein condensate confined to two dimensions. Depending on the particle density, the ratio of the contact and quadru…
Inverse magneto-refraction as a mechanism for laser modification of spin-spin exchange parameters and subsequent terahertz emission from iron oxides
R. V. Mikhaylovskiy, E. Hendry, A. Secchi +8
Ultrafast non-thermal manipulation of magnetization by light relies on either indirect coupling of the electric field component of the light with spins via spin-orbit interaction o…
Optimized Effective Potential for Quantum Electrodynamical Time-Dependent Density Functional Theory
Camilla Pellegrini, Johannes Flick, Ilya V. Tokatly +2
We propose a practical approximation to the exchange-correlation functional of (time-dependent) density functional theory for many-electron systems coupled to photons. The (time no…
Probing chirality fluctuations in molecules by nonlinear optical spectroscopy
N. Mann, P. Nalbach, S. Mukamel +1
Symmetry breaking caused by geometric fluctuations can enable processes that are otherwise forbidden. An example is a perylene bisimide dyad whose dipole moments are perpendicular…
Static correlation and electron localization in molecular dimers from the self-consistent RPA and GW approximation
Maria Hellgren, Fabio Caruso, Daniel R. Rohr +4
We investigate static correlation and delocalization errors in the self-consistent GW and random-phase approximation (RPA) by studying molecular dissociation of the H_2 and LiH mol…
Time-dependent thermal transport theory
Robert Biele, Roberto D'Agosta, Angel Rubio
Understanding thermal transport in nanoscale systems presents important challenges to both theory and experiment. In particular, the concept of local temperature at the nanoscale a…