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74 papers · 1 filter
Calculation of reduced density matrices from correlation functions
Ingo Peschel
It is shown that for solvable fermionic and bosonic lattice systems, the reduced density matrices can be determined from the properties of the correlation functions. This provides…
Non--Commutative Field Theories beyond Perturbation Theory
W. Bietenholz, F. Hofheinz, J. Nishimura
We investigate two models in non-commutative (NC) field theory by means of Monte Carlo simulations. Even if we start from the Euclidean lattice formulation, such simulations are on…
Quantum Liouville theory versus quantized Teichmüller spaces
J. Teschner
This note announces the proof of a conjecture of H. Verlinde, according to which the spaces of Liouville conformal blocks and the Hilbert spaces from the quantization of the Teichm…
Avoided intersections of nodal lines
Alejandro G. Monastra, Uzy Smilansky, Sven Gnutzmann
We consider real eigen-functions of the Schrödinger operator in 2-d. The nodal lines of separable systems form a regular grid, and the number of nodal crossings equals the number o…
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…
Magneto-optics of Gd and Tb in the soft x-ray resonance regions
J. E. Prieto, F. Heigl, O. Krupin +2
We present x-ray absorption spectra around the 3d-4f and 4d-4f excitation thresholds of in-plane magnetized Gd and Tb films measured by total electron yield using circularly polari…