Resonant harmonic generation and collective spin rotations in electrically driven quantum dots

Extreme harmonic generation in electrically driven spin resonance.

We report the observation of multiple harmonic generation in electric dipole spin resonance in an InAs nanowire double quantum dot. The harmonics display a remarkable detuning dependence: near the interdot charge transition as many as eight harmonics are observed, while at large detunings we only observe the fundamental spin resonance condition. The detuning dependence indicates that the observ...

Spatial quantum noise in singly resonant second-harmonic generation.

We study the spatial distribution of quantum noise in singly resonant second-harmonic generation. Calculations are performed below threshold for spatial modulational instability. For parameters for which the intracavity fields are modulationally stable the spatial spectrum shows maximum squeezing at k=0, whereas under conditions of modulational instability we find maximum squeezing at finite wa...

Spatial quantum noise in singly resonant second-harmonic generation: errata.

Electrically driven octahedral rotations in SrTiO3 and PbTiO3

We investigate the oxygen octahedral rotations that occur in two perovskites, SrTiO3 and PbTiO3, as a function of applied three-dimensional electric displacement field, allowing us to map out the phase diagram of rotations in both the paraelectric and ferroelectric regions of the polar response. First-principles calculations at fixed electric displacement field are used to extract parameters of...

Generation of Spin Entanglement in Nonequilibrium Quantum Dots

Stefan Legel, Jürgen König, Guido Burkard, 4 and Gerd Schön Institut für Theoretische Festkörperphysik and DFG-Center for Functional Nanostructures (CFN), Universität Karlsruhe, 76128 Karlsruhe, Germany Institut für Theoretische Physik III, Ruhr-Universität Bochum, 44780 Bochum, Germany Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland I...