A5058589561- Magnetic and transport properties of perovskites and related materials
- Quantum many-body systems
- Strong Light-Matter Interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Condensed Matter Physics
- Advancements in Photolithography Techniques
- Advanced Thermodynamics and Statistical Mechanics
- Quantum Information and Cryptography
- Surface Roughness and Optical Measurements
- Quantum, superfluid, helium dynamics
- Advanced Thermoelectric Materials and Devices
- Near-Field Optical Microscopy
- Adaptive optics and wavefront sensing
- Rare-earth and actinide compounds
- Advanced optical system design
- Optical Coatings and Gratings
- Advanced Physical and Chemical Molecular Interactions
- Optical properties and cooling technologies in crystalline materials
- Physics of Superconductivity and Magnetism
Carl Zeiss (Germany)
2016-2018
Forschungszentrum Jülich
2012-2013
Yale University
2011
RWTH Aachen University
2008
We establish a setting---atoms in optical superlattices with period 2---in which one can experimentally probe signatures of the process local relaxation and apparent thermalization nonequilibrium dynamics without need addressing single sites. This opens up way to explore convergence subsystems maximum entropy states quenched quantum many-body systems present technology. Remarkably, emergence thermal does not follow from coupling an environment but is result complex closed systems. ways...
In the study of relaxation processes in coherent non-equilibrium dynamics quenched quantum systems, ultracold atoms optical superlattices with periodicity two provide a very fruitful test ground. this work, we consider particular, experimentally accessible initial state prepared superlattice structure evolving under Bose-Hubbard Hamiltonian entire range interaction strengths, further investigating issues raised Ref. [Phys. Rev. Lett. 101, 063001 (2008)]. We investigate analytically non...
We study the mechanism of orbital-order melting observed at temperature T_OO in series rare-earth manganites. find that many-body super-exchange yields a transition-temperature T_KK decreases with decreasing radius, and increases pressure, opposite to experimental T_OO. show tetragonal crystal-field splitting reduces further increasing discrepancies experiments. This proves effects, although very efficient, light experimentally trends, play minor role for orbital ordering
We use an efficient general hybridization-expansion continuous-time quantum Monte Carlo impurity solver (Krylov approach) to study orbital and spin ordering phenomena in strongly correlated systems within the local-density approximation plus dynamical mean-field theory approach. This allows us include often-neglected interaction terms, models with large basis sets, consider crystals low-symmetry distortions, reach very low experimental temperatures. this a selection of exemplary...
The electric field at the output of an optical system is in general affected by both aberrations and diffraction. Many simulation techniques treat two phenomena separately, using a geometrical propagator to calculate effects wave-optical simulate We present ray-based method that accounts for diffraction within single framework. based on Huygens–Fresnel principle, entirely performed Monte Carlo ray tracing, and, contrast our previously published work, able full electromagnetic field....
Abstract Efficient performance assessment is essential during the design of systems involving complex aspheres. We present new classes pupil sampling schemes that, with a reduced number rays, yield accurate estimates RMS wavefront aberration over circular pupil. It turns out that samples in can be by factor about 0.7, and these ideas also expected to lead similar additional reduction when averaging field color. Beyond analysis patented lens system used establish path further significant reductions.