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Approximating Matsubara dynamics using the planetary model
Matsubara dynamics is the quantum-Boltzmann-conserving classical dynamics which remains when real-time coherences are taken out of the exact quantum Liouvillian [T. J. H. Hele et al., J. Chem. Phys. 142, 134103 (2015)]; because...
Instabilities of High Speed Dislocations.
Despite numerous theoretical models and simulation results, a clear physical picture of dislocations traveling at velocities comparable to the speed of sound in the medium remains elusive. Using two complementary atomistic...
Effect of stray fields on Rydberg states in hollow-core PCF probed by higher-order modes.
The spectroscopy of atomic gases confined in hollow-core photonic crystal fiber (HC-PCF) provides optimal atom-light coupling beyond the diffraction limit, which is desirable for various applications such as sensing...
Quantum dot spin coherence governed by a strained nuclear environment.
The interaction between a confined electron and the nuclei of an optically active quantum dot provides a uniquely rich manifestation of the central spin problem. Coherent qubit control combines with an ultrafast spin-photon...
A Josephson relation for fractionally charged anyons.
Anyons occur in two-dimensional electron systems as excitations with fractional charge in the topologically ordered states of the fractional quantum Hall effect (FQHE). Their dynamics are of utmost importance for topological...
Electrical Control of the Zeeman Spin Splitting in Two-Dimensional Hole Systems.
E Marcellina, A Srinivasan, DS Miserev, AF Croxall, DA Ritchie, I Farrer, OP Sushkov, Dimitrie Culcer, AR Hamilton
Mar 07, 2019
Semiconductor holes with strong spin-orbit coupling allow all-electrical spin control, with broad applications ranging from spintronics to quantum computation. Using a two-dimensional hole system in a gallium arsenide quantum...
Nonlinear optical effects during femtosecond superradiant emission generation in semiconductor laser structures.
This paper presents theoretical and experimental studies of ultrabright internal second harmonic during femtosecond superradiant emission generation in multiple sections GaAs/AlGaAs laser structures at room temperature....
Dynamic Optical Lattices of Subwavelength Spacing for Ultracold Atoms.
We propose a scheme for realizing lattice potentials of subwavelength spacing for ultracold atoms. It is based on spin-dependent optical lattices with a time-periodic modulation. We show that the atomic motion is well described...
LO-Phonon Emission Rate of Hot Electrons from an On-Demand Single-Electron Source in a GaAs/AlGaAs Heterostructure.
N Johnson, C Emary, S Ryu, H-S Sim, P See, JD Fletcher, JP Griffiths, GAC Jones, I Farrer, DA Ritchie, M Pepper, TJBM Janssen, M Kataoka
Mar 04, 2019
Using a recent time-of-flight measurement technique with 1 ps time resolution and electron-energy spectroscopy, we develop a method to measure the longitudinal-optical-phonon emission rate of hot electrons traveling along a...
High stability and luminescence efficiency in donor-acceptor neutral radicals not following the Aufbau principle.
Haoqing Guo, Qiming Peng, Xian-Kai Chen, Qinying Gu, Shengzhi Dong, Emrys W Evans, Alexander J Gillett, Xin Ai, Ming Zhang, Dan Credgington, Veaceslav Coropceanu, Richard H Friend, Jean-Luc Brédas, Feng Li
Dec 10, 2019
Electron transport behavior of quinoidal heteroacene-based junctions
The electron transport behavior through a series of molecular junctions composed of tetracene (TC) and S/O substituted-TC (S/O-TC) has been studied using density functional theory (DFT) combined with the non-equilibrium Green's...
Nonadiabatic forces in ion-solid interactions
The Born-Oppenheimer approximation is the keystone for molecular dynamics simulations of radiation damage processes; however, actual materials response involves nonadiabatic energy exchange between nuclei and electrons. In this...
Bulk molybdenum field emitters by inductively coupled plasma etching.
In this work we report on the fabrication of inductively coupled plasma (ICP) etched, diode-type, bulk molybdenum field emitter arrays. Emitter etching conditions as a function of etch mask geometry and process conditions were...
Harmonic Force Constants for Molecular Mechanics Force Fields via Hessian Matrix Projection.
A modification to the Seminario method [ Int. J. Quantum Chem. 1996 , 60 , 1271 - 1277 ] is proposed, which derives accurate harmonic bond and angle molecular mechanics force field parameters directly from the quantum mechanical...
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