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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Random phase approximation for the mean-field electron gas （3）
平均场 电子气 随机相位近似
2023/11/29
Random phase approximation (RPA) was proposed by Bohm and Pines in four seminal papers during 1951-1953 to describe the correlation of fermions, namely the correction to the Hartree-Fock theory. While...
Nucleon structure and parity-violating electron scattering
Contribution to the quark nuclear structure quark model vector current nuclear elastic electron scattering
2014/12/22
We review the area of strange quark contributions to nucleon structure. In particular, we focus on current models of strange quark vector currents in the nucleon and the associated parity-violating el...
A new twist on transmission electron microscopy (TEM) could enable the technique to unlock even more secrets on the nanoscale. Researchers in the US have produced a helical-shaped beam of electrons th...
Electron star birth: A continuous phase transition at nonzero density
Electron star birth continuous phase transition
2010/12/24
We show that charged black holes in Anti-de Sitter spacetime can undergo a third order phase transition at a critical temperature in the presence of charged fermions. In the low temperature phase, a f...
Hydrodynamic description of transport in strongly correlated electron systems
Hydrodynamic description strongly correlated electron systems
2010/11/22
We develop a hydrodynamic description of the resistivity and magnetoresistance of an electron
liquid in a smooth disorder potential. This approach is valid when the electron-electron scattering lengt...
Excited electron-bubble states in superfluid helium-4: a time-dependent density functional approach
Excited electron-bubble states time-dependent density functional approach
2010/11/19
We present a systematic study on the excited electron-bubble states in super uid 4He using a
time-dependent density functional approach. For the evolution of the 1P bubble state, two di erent functio...
Effect of quasi-bound states on coherent electron transport in twisted nanowires
quasi-bound states coherent electron transport twisted nanowires
2010/11/8
Quantum transmission spectra of a twisted electron waveguide expose the coupling between traveling and quasi-bound states. Through a direct numerical solution of the open-boundary Schr\"odinger equati...
Synchronized single electron emission from dynamical quantum dots
Synchronized single electron emission dynamical quantum dots
2010/11/22
We study synchronized quantized charge pumping through several dynamical quantum dots (QDs) driven by a single time modulated gate signal. We show that the main obstacle for synchronization being the ...
Electron transport and anisotropy of the upper critical magnetic field in a Ba0.68K0.32Fe2As2 single crystals
Electron transport anisotropy of the upper critical magnetic field
2010/11/17
Early work on the iron-arsenide compounds supported the view, that a reduced dimensionality might be a necessary prerequisite for high–Tc superconductivity. Later, however, it was found that the zero-...
Effect of Dephasing on Electron Transport in a Molecular Wire: Green's Function Approach
Effect Electron Transport Molecular Wire Green's Function Approach
2010/11/19
The effect of dephasing on electron transport through a benzene molecule is carefully examined
using a phenomenological model introduced by B¨uttiker. Within a tight-binding framework all the calcula...
Universal quantum control of two-electron spin quantum bits using dynamic nuclear polarization
Universal quantum control two-electron spin quantum bits dynamic nuclear polarization
2010/10/27
One fundamental requirement for quantum computation is to perform universal manipulations
of quantum bits at rates much faster than the qubit’s rate of decoherence. Recently,
fast gate operations ha...
Width dependent collisionless electron dynamics in the static fields of the shock ramp,2,Phase space portrait
Width dependent collisionless electron dynamics static fields shock ramp Phase space portrait
2009/11/13
We study numerically in detail the behaviour of electrons in the strongly inhomogeneous static magnetic and electric fields, which are typical for thin quasiperpendicular collisionless shocks. We pay ...
Width dependent collisionless electron dynamics in the static fields of the shock ramp,1,Single particle behavior and implications for downstream distribution
Width dependent collisionless electron dynamics static fields shock ramp
2009/11/13
We study the collisionless dynamics of electrons in the shock ramp using the numerical trajectory analysis in the model electric and magnetic fields of the shock. Even with very modest assumptions abo...
Correlation energy in a triplet state of a two-electron spherical quantum dot
Spherical quantum dot Square well confinement Correlation energies Singlet and Triplet states
2010/7/8
Correlation energies in the (1s-1p) triplet state of a two-electron spherical QD with square-well potential confinement are estimated for dots of different radii. The results are presented taking GaAs...
Neutrino energy loss by electron capture in magnetic field at the crusts of neutron stars
strong magnetic field neutrino energy loss neutron star
2009/7/31
Based on the p-f shell model, the effect of strong magnetic field on neutrino energy loss rates by electron capture is investigated. The calculations show that the magnetic field has only a slight eff...