Results 41 to 50 of about 173,599 (260)
Compilation of low-energy constraints on 4-fermion operators in the SMEFT [PDF]
, 2017 A bstractWe compile information from low-energy observables sensitive to flavor-conserving 4-fermion operators with two or four leptons. Our analysis includes data from e+e− colliders, neutrino scattering on electron or nucleon targets, atomic parity ...
A. Falkowski +2 more
semanticscholar +1 more source
Weyl–Kondo semimetal in heavy-fermion systems [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2016 Significance While electronic states with nontrivial topology have traditionally been known in insulators, they have been evidenced in metals during the past 2 years.
Hsin-Hua Lai +3 more
semanticscholar +1 more source
Aufbau principle and singlet‐triplet gap in spherical Hooke atoms
International Journal of Quantum Chemistry, Volume 123, Issue 3, February 5, 2023., 2023 The singlet‐triplet gap for three dimensional Hooke atoms is characterized using high‐level quantum methods with optimized basis sets. The effect of the confinement potential and screening effects is discussed. We have found that the triplet‐singlet gap as a function of the numbers of electrons can be rationalized with the following orbital ordering 1s<
Xabier Telleria‐Allika +5 more
wiley +1 more source
Two relativistic Kondo effects: Classification with particle and antiparticle impurities
Physical Review Research, 2021 We investigate two different types of relativistic Kondo effects, distinguished by heavy-impurity degrees of freedom, by focusing on the energy-momentum dispersion relations of the ground state with condensates composed of a light Dirac fermion and a ...
Yasufumi Araki +3 more
doaj +1 more source
Trapped fermions with density imbalance in the BEC limit [PDF]
PRL 96, 150404 (2006), 2005 We analyze the effects of imbalancing the populations of two-component trapped fermions, in the BEC limit of the attractive interaction between different fermions. Starting from the gap equation with two fermionic chemical potentials, we derive a set of coupled equations that describe composite bosons and excess fermions.
arxiv +1 more source
Fermion Path Integrals And Topological Phases [PDF]
, 2015 Symmetry-protected topological (SPT) phases of matter have been interpreted in terms of anomalies, and it has been expected that a similar picture should hold for SPT phases with fermions. Here, we describe in detail what this picture means for phases of
E. Witten
semanticscholar +1 more source
Experimental evidence of hourglass fermion in the candidate nonsymmorphic topological insulator KHgSb [PDF]
Science Advances, 2016 Photoemission established KHgSb as a nonsymmorphic topological insulator, which hosts hourglass-shaped surface states. Topological insulators (TIs) host novel states of quantum matter characterized by nontrivial conducting boundary states connecting ...
Junzhang Ma +17 more
semanticscholar +1 more source
The self-consistent field model for Fermi systems with account of three-body interactions
Condensed Matter Physics, 2015 On the basis of a microscopic model of self-consistent field, the thermodynamics of the many-particle Fermi system at finite temperatures with account of three-body interactions is built and the quasiparticle equations of motion are obtained. It is shown
Yu.M. Poluektov +2 more
doaj +1 more source
Majorana neutrino as Bogoliubov quasiparticle
Physics Letters B, 2017 We suggest that the Majorana neutrino should be regarded as a Bogoliubov quasiparticle that is consistently understood only by use of a relativistic analogue of the Bogoliubov transformation.
Kazuo Fujikawa, Anca Tureanu
doaj +1 more source
Mixing-demixing in a trapped degenerate fermion-fermion mixture [PDF]
Phys. Rev. A 73 (2006) 043619 (1-6), 2006 We use a time-dependent dynamical mean-field-hydrodynamic model to study mixing-demixing in a degenerate fermion-fermion mixture (DFFM). It is demonstrated that with the increase of interspecies repulsion and/or trapping frequencies, a mixed state of DFFM could turn into a fully demixed state in both three-dimensional spherically-symmetric as well as ...
arxiv +1 more source