956 citations
- European Theoretical Spectroscopy FacilityBE18 papers
- Centre National de la Recherche ScientifiqueFR11 papers
- University of JyväskyläFI10 papers
- University of the Basque CountryES10 papers
- Donostia International Physics CenterES9 papers
- Joint Institute for Nuclear ResearchRU9 papers
- University of BolognaIT9 papers
- Fritz Haber Institute of the Max Planck SocietyDE7 papers
- University of Duisburg-EssenDE7 papers
- Helsinki Institute of PhysicsFI6 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT6 papers
- Max Planck SocietyDE6 papers
10 papers · 1 filter
Quantum wires with magnetic fluxes
Vadim Kostrykin, Robert Schrader
In the present article magnetic Laplacians on a graph are analyzed. We provide a complete description of the set of all operators which can be obtained from a given self-adjoint La…
Symmetry groups, semidefinite programs, and sums of squares
Karin Gatermann, Pablo A. Parrilo
We investigate the representation of symmetric polynomials as a sum of squares. Since this task is solved using semidefinite programming tools we explore the geometric, algebraic,…
Some notes concerning the homogeneity of Boolean algebras and Boolean spaces
Stefan Geschke, Saharon Shelah
We consider homogeneity properties of Boolean algebras that have nonprincipal ultrafilters which are countably generated.It is shown that a Boolean algebra B is homogeneous if it i…
Conductance from Non-perturbative Methods I
Olalla A. Castro-Alvaredo, Andreas Fring
We investigate different methods to compute the DC conductance in a quantum wire doped with some impuritied by exploiting the integrability of the theories under consideration. As…
Simplified Transfer Matrix Approach in the Two-Dimensional Ising Model with Various Boundary Conditions
Boris Kastening
A recent simplified transfer matrix solution of the two-dimensional Ising model on a square lattice with periodic boundary conditions is generalized to periodic-antiperiodic, antip…
The Graph of Monomial Ideals
Klaus Altmann, Bernd Sturmfels
There is a natural infinite graph whose vertices are the monomial ideals in a polynomial ring. The definition involves Gröbner bases or the action of an algebraic torus. We present…