We adapt the compression algorithm of Weinstein, Auerbach, and Chandra from eigenvectors of spin lattice Hamiltonians to eigenvectors of light-front field-theoretic Hamiltonians. The latter are approximated by the standard discrete light-cone quantization technique, which provides a matrix representation of the Hamiltonian eigenvalue problem. The eigenvectors are represented as singular value d...

A spin tunnel junction based on manganites, with La1−xSrxMnO3 LSMO as ferromagnetic metallic electrodes and the undoped parent compound LaMnO3 LMO as insulating barrier, is here theoretically discussed using double-exchange model Hamiltonians and numerical techniques. For an even number of LMO layers, the ground state is shown to have antiparallel LSMO magnetic moments. This highly resistive, b...

Schematic su(2)⊕ h3 interaction Hamiltonians, where su(2) plays the role of the pseudo-spin algebra of fermion operators and h3 is the Heisenberg algebra for bosons, are shown to be closely related to certain nonlinear models defined on a single quantum algebra suq(2) of quasifermions. In particular, suq(2) analogues of the Da ProvidenciaSchütte and extended Lipkin models are presented. The con...

Two-dimensional colloidal suspensions exposed to periodic external fields exhibit a variety of molecular crystalline phases. There two or more colloids assemble at lattice sites of potential minima to build new structural entities, referred to as molecules. Using the strength of the potential and the filling fraction as control parameters, a phase transition to unconventional orientationally or...

We give from first principles the non-relativistic limit of scalar and Dirac fields in curved spacetime. aim to find general relativistic corrections quantum theory particles affected by Newtonian gravity, a regime nowadays experimentally accessible. believe that ever-improving measurement accuracy theoretical interest finding effects systems require introduction Schr\"{o}dinger-Newtonian theor...

In this paper, the Hartree-Fock method has been formulated to investigate some of the ground state properties of quasi-one-dimensional interacting electron gas in the presence of the magnetic field. The bare coulomb interaction between electrons has been assumed. For this system, we have also computed some of its thermodynamic and magnetic properties such as the energy, pressure, incompressibil...

We study isotropic Gaussian random fields on the high-dimensional sphere with an added deterministic linear term, also known as mixed p-spin Hamiltonians external field. prove that if field is sufficiently strong, then resulting function has trivial geometry, only two critical points. This contrasts situation of no or weak where these functions typically have exponential number give explicit th...