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60 papers · 1 filter
On quantum microcanonical equilibrium
Dorje C. Brody, Daniel W. Hook, Lane P. Hughston
A quantum microcanonical postulate is proposed as a basis for the equilibrium properties of small quantum systems. Expressions for the corresponding density of states are derived,…
Entanglement of three-qubit geometry
Dorje C. Brody, Anna C. T. Gustavsson, Lane P. Hughston
Geometric quantum mechanics aims to express the physical properties of quantum systems in terms of geometrical features preferentially selected in the space of pure states. Geometr…
Aspects of spinorial geometry
U. Gran, J. Gutowski, G. Papadopoulos +1
We review some aspects of the spinorial geometry approach to the classification of supersymmetric solutions of supergravity theories. In particular, we explain how spinorial geomet…
Perturbations of Jordan Matrices
E B Davies, Mildred Hager
We consider perturbations of a large Jordan matrix, either random and small in norm or of small rank. In both cases we show that most of the eigenvalues of the perturbed matrix are…
New boundary conditions for the c=-2 ghost system
Thomas Creutzig, Thomas Quella, Volker Schomerus
We investigate a novel boundary condition for the bc system with central charge c=-2. Its boundary state is constructed and tested in detail. It appears to give rise to the first e…
Non-commutative Weitzenboeck geometry, gerbe modules, and WZW branes
Andreas Recknagel, Rafal R. Suszek
We study the non-commutative matrix model which arises as the low-energy effective action of open strings in WZW models. We re-derive this fuzzy effective gauge dynamics in two dif…