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We investigate the 1/3 fractional quantum Hall state with one and two quasiparticle excitations. It is shown that the quasiparticle excitations are best described as excited composite fermions occupying higher composite-fermion quasi-Landau…

介观与纳米尺度物理 · 物理学 2016-08-31 Gun Sang Jeon , Jainendra K. Jain

The problem of fermion dynamics is studied using the Q-function for fermions. This is a probabilistic phase-space representation, which we express using Majorana operators, so that the phase-space variable is a real antisymmetric matrix. We…

量子物理 · 物理学 2021-04-27 Ria Rushin Joseph , Laura E C Rosales-Zárate , Peter D Drummond

We present possible ground-state structures of two-component atomic Fermi gases with repulsive interactions in a thin spherical shell geometry by implementing a self-consistent Hartree-Fock approximation. The system exhibits a…

量子气体 · 物理学 2024-12-09 Yan He , Chih-Chun Chien

We consider hamiltonian models representing an arbitrary number of spin $1/2$ fermion quantum fields interacting through arbitrary processes of creation or annihilation of particles. The fields may be massive or massless. The interaction…

数学物理 · 物理学 2020-01-08 Benjamin Alvarez , Jérémy Faupin , Jean-Claude Guillot

We consider interactions of fermions with the domain wall bubbles produced during the first order phase transitions. New exact solution of Dirac equations and reflection coefficient are obtained.

高能物理 - 唯象学 · 物理学 2007-05-23 Andro Barnaveli , Merab Gogberashvili

It has been pointed out by Smet that there are fractional-charge values which do not fit with their formula of composite fermions. We find that our formula predicts these fractional charges very well and in fact there exists a relationship…

介观与纳米尺度物理 · 物理学 2007-05-23 Keshav N. Shrivastava

We present the quantum critical theory of an interacting nodal Fermi-liquid of quasi-relativisitc pseudo-spin-3/2 fermions that have a non-interacting birefringent spectrum with two distinct Fermi velocities. When such quasiparticles…

介观与纳米尺度物理 · 物理学 2018-10-15 Bitan Roy , Malcolm P. Kennett , Kun Yang , Vladimir Juricic

We throw further light on a recently discussed Kerr-Newman type formulation of Fermions and the related cosmological scheme which predicted an ever expanding universe, as indeed has subsequently been confirmed. In the spirit of the…

量子物理 · 物理学 2007-05-23 B. G. Sidharth

A key problem in the field of quantum criticality is to understand the nature of quantum phase transitions in systems of interacting itinerant fermions, motivated by experiments on a variety of strongly correlated materials. Much attention…

强关联电子 · 物理学 2021-06-30 Rufus Boyack , Hennadii Yerzhakov , Joseph Maciejko

By means of a new canonical transformation for the one-band Hubbard model at half filling we show the existence of Cooper pairs formed by strongly interacting quasiparticles.

强关联电子 · 物理学 2009-02-12 Valentin Voroshilov

The composite-fermion approach as formulated in the fermion Chern-Simons theory has been very successful in describing the physics of the lowest Landau level near Landau level filling factor 1/2. Recent work has emphasized the fact that the…

介观与纳米尺度物理 · 物理学 2009-10-31 Felix von Oppen , Bertrand I. Halperin , Steven H. Simon , Ady Stern

In the model every quark or lepton is identified with a quartet of four "more elementary" particles. One particle in a quartet is a massive spin-0 boson and other three particles are massless spin-1/2 fermions.

高能物理 - 唯象学 · 物理学 2007-05-23 N. G. Marchuk

We describe the quantum phases of interacting three component fermions in the presence of spin-orbit coupling, as well as linear and quadratic Zeeman fields. We classify the emerging superfluid phases in terms of the loci of zeros of their…

量子气体 · 物理学 2016-12-08 Doga Murat Kurkcuoglu , C. A. R. Sa de Melo

We discuss some aspects of the gravitational interaction of the relativistic quantum particles with spin 1/2. The exact Foldy-Wouthuysen transformation is constructed for the Dirac particle coupled to the static spacetime metric. The…

广义相对论与量子宇宙学 · 物理学 2015-06-25 Yuri N. Obukhov

We investigate the dynamics of the system of multiple bright and dark quasisolitons generated in a one-component ultracold Fermi gas via the phase imprinting technique in terms of atomic orbitals approach. In particular, we analyze the…

其他凝聚态物理 · 物理学 2009-11-10 Emilia Witkowska , Miroslaw Brewczyk

We study systems that approach a state possessing discrete symmetry due to different degenerate realizations for the system. For concreteness, we consider fractionally filled systems where degeneracy comes from the presence of identical…

介观与纳米尺度物理 · 物理学 2024-06-21 A. N. Grigorenko

We describe the development of a theoretical description of the structure of finite nuclei based on a relativistic quark model of the structure of the bound nucleons which interact through the (self-consistent) exchange of scalar and vector…

核理论 · 物理学 2015-06-26 P. A. M. Guichon , K. Saito , A. W. Thomas

We develop a consistent formalism in order to explore the effects of density and spin fluctuations on the quasi-particle properties and on the pairing critical temperature of a trapped Fermi gas on the attractive side of a Feshbach…

We study the energy of quasi-particles in graphene within the Hartree-Fock approximation. The quasi-particles are confined via an inhomogeneous magnetic field and interact via the Coulomb potential. We show that the associated functional…

介观与纳米尺度物理 · 物理学 2010-05-07 R. Egger , A. De Martino , H. Siedentop , E. Stockmeyer

Highly polarized mixtures of atomic Fermi gases constitute a novel Fermi liquid. We demonstrate how information on thermodynamic properties may be used to calculate quasiparticle scattering amplitudes even when the interaction is resonant…

统计力学 · 物理学 2008-06-19 G. M. Bruun , A. Recati , C. J. Pethick , H. Smith , S. Stringari