نتایج جستجو برای: fermion system
تعداد نتایج: 2241971 فیلتر نتایج به سال:
We discuss Abelian and non-Abelian three dimensional bosoniza-tion within the path-integral framework. We present a systematic approach leading to the construction of the bosonic action which, together with the bosonization recipe for fermion currents, describes the original fermion system in terms of vector bosons.
This chapter complements our paper: ”Spectral optimized asymmetric segmented phase-only correlation filter ASPOF filter” published in Applied Optics (2012).
According to the composite fermion theory, the interacting electron system at filling factor ν is equivalent to the non-interacting composite fermion system at ν = ν/(1 − 2mν), which in turn is related to the non-interacting electron system at ν. We show that several eigenstates of non-interacting electrons at ν do not have any partners for interacting electrons at ν, but, upon composite fermio...
We study the transport properties of one-dimensional (1D) interacting Fermions through a barrier by numerically calculating the Kohn charge stiffness constant and the relative Drude weight. We find that the transport properties of the 1D Hubbard model are quite different from those of the 1D spinless Fermion model. For example, the presence of the attractive interaction between electrons in the...
We show that the non-equilibrium steady state (NESS) of the free lattice Fermion model far from equilibrium is macroscopically unstable. The problem is translated to that of the spectral analysis of Liouville Operator. We use the method of positive commutators to investigate it. We construct a positive commutator on the lattice Fermion system, whose dispersion relation is ω(k) = cos k − γ.
Nonsingularity conditions are established for the BFV gauge-fixing fermion which are sufficient for it to lead to the correct path integral for a theory with constraints canonically quantized in the BFV approach. The conditions ensure that anticommutator of this fermion with the BRST charge regularises the path integral by regularising the trace over non-physical states in each ghost sector. Th...
Majorana fermion is a hypothetical particle that is its own antiparticle. We report transport measurements that suggest the existence of one-dimensional chiral Majorana fermion modes in the hybrid system of a quantum anomalous Hall insulator thin film coupled with a superconductor. As the external magnetic field is swept, half-integer quantized conductance plateaus are observed at the locations...
In this paper we describe the implementation of the QED process γγ → γγ through a fermion loop into the framework of SANC system. The computations of this process takes into account non-zero mass of loop-fermion. We briefly describe additional precomputation modules used for calculation of massive fermion-box diagrams. We present the covariant and helicity amplitudes for this process and also s...
We present results for the equation of state of a graphene-like model in an effort to understand the properties of its quantum phase transition. The Nf fermion species interact through a three dimensional instantaneous Coulomb potential. Since there are no reliable analytical tools that work for all values of Nf and the coupling constant g , we rely on Monte Carlo simulations to calculate the c...
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