This work studies heat transport of bond-disordered spin-1/2 chains. As an example, the XX case is analyzed, which corresponds to a model of noninteracting spinless fermions. Within the fermion representation, the singleparticle eigenenergies are determined numerically, which allow one to compute transport coefficients. Since the ballistic transport properties of a clean chain are destroyed by ...

By adopting a methodology proposed by R. J. Adler et al., we study the interesting analogy between fermion-gravity and fermion-electromagnetic interactions in presence of minimal Lorentz-violating (LV) fermion coefficients. The single-fermion matrix elements gravitational interaction (SMEGI) are obtained with prescribed Lense-Thirring (LT) metric assuming test particle assumption. Quite distinc...

We investigate a well studied system of quantum dot coupled to Coulomb box and leads, realizing spin-flavor Kondo model. It exhibits recently discovered non-Fermi liquid (NFL) behavior with emergent SO(5) symmetry. Here, through detailed bosonization refermionization solution, we push forward our previous work provide consistent complete description the various exotic properties phase diagram. ...

We develop a supersymmetric representation of the Hubbard operators which unifies the Slave Boson and Slave Fermion representations, allowing a second-quantized treatment of Hubbard operators with both symmetric and anti-symmetric character. We provide a simple example of the application of this method to the atomic limit of the Hubbard model and discuss its more general application to the infi...

It is shown that the (quantum or classical) observables for a spin-12 massive electron are invariant under a local one-parameter group of gauge transformation whose generator is dependent on the fermion “fields” of the theory, as well as conventional (constant) Lie algebra generators. This one-parameter family of local transformations is 2 → 1 homomorphic to a set of operators common to both th...

We study a Kitaev chain model, which is the simplest model of topological superconductors hosting Majorana fermion, appearing as zero-energy state at edge. analytically calculate Green's function semi-infinite with delta-function-type impurity potential within quasiclassical regime to obtain spatial dependence induced odd-frequency pairing. It found that if position not far from edge, profile l...