Results 31 to 40 of about 4,238 (224)
Remote Sensing, 2022 The concept of the phase space plays a key role in the analysis of oscillating signals. For a 1-D signal, the coordinates of the 2-D phase space are the observation time and the instant frequency. For measurements of propagating wave fields, the time and
Michael Gorbunov, Oksana Dolovova
doaj +1 more source
Superradiance and Broadband Emission Driving Fast Electron Dephasing in Open Quantum Systems
Advanced Science, EarlyView.We uncover the physical origin of ultrafast electron dephasing in solid‐state high‐harmonic generation by simulating the Lindblad equation for the dissipative Hubbard model. Coexistence of Dicke superradiance and broadband emission is revealed, whose destructive interference shortens the effective scattering time and provides a unified picture of ...
Gimin Bae, Youngjae Kim, Jae Dong Lee
wiley +1 more source
Complexity growth and the Krylov-Wigner function
Journal of High Energy PhysicsFor any state in a D-dimensional Hilbert space with a choice of basis, one can define a discrete version of the Wigner function — a quasi-probability distribution which represents the state on a discrete phase space.
Ritam Basu +3 more
doaj +1 more source
Phase-space description of the coherent state dynamics in a small one-dimensional system
Open Physics, 2016 The Wigner-Moyal approach is applied to investigate the dynamics of the Gaussian wave packet moving in a double-well potential in the ‘Mexican hat’ form.
Kaczor Urszula +4 more
doaj +1 more source
Quark Wigner distributions using light-front wave functions [PDF]
Physical Review D, 2017 21 pages, 5 figures, version published by Phys.
MORE, J, MUKHERJEE, A, NAIR, S
openaire +3 more sources
Advanced Science, EarlyView.This study achieves anisotropic thermal expansion tuning in Nd2(Co1‐xFex)17‐yCry compounds via a magnetoelastic strategy. Variable‐temperature synchrotron X‐ray diffraction reveals that increased Fe content induces switchable lattice responses. Compositional control reduces the volume expansion coefficient αV by 20% (x═0.7) and modulates TC (442–625 K),
Jiayuan Li +8 more
wiley +1 more source
The Quantum Statistical Mechanical Theory of Transport Processes [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 1993 A new derivation of the quantum Boltzmann transport equation for the Fermion system from the quantum time evolution equation for the wigner distribution function is presented.
Ali Maghari, Hassan Behnejad
doaj
Wigner phase-space distribution as a wave function [PDF]
Physical Review A, 2013 6 pages and 2 ...
Bondar, Denys I. +3 more
openaire +2 more sources
Photonuclear Population of 229m,gTh in Th‐Doped Crystals Toward Nuclear Clock Development
Advanced Science, EarlyView.This study demonstrates a novel photonuclear approach for producing the nuclear clock isomer 229mTh in thorium‐doped crystals, overcoming current supply limitations. Through cross‐section calculations and Monte Carlo simulations, we identify optimal crystal materials and irradiation conditions, achieving high signal‐to‐noise ratios.
Hao‐Yang Lan +9 more
wiley +1 more source
Approximating the Time-Frequency Representation of Biosignals with Chirplets
EURASIP Journal on Advances in Signal Processing, 2010 A new member of the Cohen's class time-frequency distribution is proposed. The kernel function is determined adaptively based on the signal of interest. The kernel preserves the chirp-like components while removing interference terms generated due to
Omid Talakoub, Jie Cui, Willy Wong
doaj +2 more sources