Results 11 to 20 of about 19,779 (264)
Anomalous discrete flavor symmetry and domain wall problem
Physics Letters B, 2019 Discrete flavor symmetry is often introduced for explaining quark/lepton masses and mixings. However, its spontaneous breaking leads to the appearance of domain walls, which is problematic for cosmology. We consider a possibility that the discrete flavor
So Chigusa, Kazunori Nakayama
doaj +1 more source
Impact of Nd Doping on Electronic, Optical, and Magnetic Properties of ZnO: A GGA + U Study
Molecules, 2023 The electronic, optical, and magnetic properties of Nd-doped ZnO systems were calculated using the DFT/GGA + U method. According to the results, the Nd dopant causes lattice parameter expansion, negative formation energy, and bandgap narrowing, resulting
Qiao Wu +7 more
doaj +1 more source
Coherent backscattering of intense light by cold atoms with degenerate energy levels: Diagrammatic treatment [PDF]
Physical Review A, 2014 We present a generalization of the diagrammatic pump-probe approach to coherent backscattering (CBS) of intense laser light for atoms with degenerate energy levels. We employ this approach for a characterization of the double scattering signal from optically pumped atoms with the transition $J_g\rightarrow J_e=J_g+1$ in the helicity preserving ...
Shatokhin, V. N. +3 more
openaire +4 more sources
SciPost Physics, 2021 We investigate the two-dimensional motion of relativistic cold electrons in the presence of ‘strictly’ spatially varying magnetic fields satisfying, however, no magnetic monopole condition.
Srishty Aggarwal, Banibrata Mukhopadhyay, Gianluca Gregori
doaj +1 more source
Degeneracy of light scattering and absorption by a single nanowire
Scientific Reports, 2021 We theoretically and numerically prove that under an electromagnetic plane wave with linear polarization incident normally to a single nanowire, there exists a power diagram that could indicate scattering properties for any system configurations ...
Jeng Yi Lee, Yi-Huan Chen, Pai-Yen Chen
doaj +1 more source
Theory of noninteracting fermions and bosons in the canonical ensemble
Physical Review Research, 2020 We present a self-contained theory for the exact calculation of particle number counting statistics of noninteracting indistinguishable particles in the canonical ensemble.
Hatem Barghathi +2 more
doaj +1 more source
Nonlinear propagation of polarized light pulses in a medium of atoms with degenerate energy levels: Adiabatic approach [PDF]
Physical Review A, 2013 12 pages, 4 ...
Yudin, V. I. +3 more
openaire +2 more sources
Photonics, 2022 Photoionization dynamics of bounded electrons in the ground state, the first and second excited states of a hydrogen atom, triggered by ultrashort near-infrared laser pulses, have been investigated in a transition regime (γ∼1) that offers both multiphoton and tunneling features.
Peipei Xin +4 more
openaire +2 more sources
Application of quasi-degenerate perturbation theory to the calculation of rotational energy levels of methane vibrational polyads [PDF]
The Journal of Chemical Physics, 2015 In previous works, we have introduced an alternative perturbation scheme to find approximate solutions of the spectral problem for the rotation-vibration molecular Hamiltonian. An important feature of our approach is that the zero order Hamiltonian is the direct product of a purely vibrational Hamiltonian with the identity on the rotational degrees of ...
Cassam-Chenaï, Patrick +4 more
openaire +4 more sources
Tetraquark operators in lattice QCD and exotic flavour states in the charm sector
Journal of High Energy Physics, 2017 We present a general class of operators resembling compact tetraquarks which have a range of colour-flavour-spin structures, transform irreducibly under the symmetries of the lattice and respect other relevant symmetries.
Gavin K. C. Cheung +4 more
doaj +1 more source