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43 papers · 1 filter
Subalgebras with Converging Star Products in Deformation Quantization: An Algebraic Construction for $\complex \mbox{\LARGE P}^n$
M. Bordemann, M. Brischle, C. Emmrich +1
Based on a closed formula for a star product of Wick type on $\CP^n$, which has been discovered in an earlier article of the authors, we explicitly construct a subalgebra of the fo…
Quantum Effects in Barrier Dynamics
Joachim Ankerhold, Hermann Grabert
The dynamics near the top of a potential barrier is studied in the temperature region where quantum effects become important. The time evolution of the density matrix of a system t…
Semiclassical Density Matrix Near the Top of a Barrier
F. J. Weiper, J. Ankerhold, H. Grabert
Employing the path integral approach, we calculate the semiclassical equilibrium density matrix of a particle moving in a nonlinear potential field for coordinates near the top of…
Coulomb Charging at Large Conduction
Xiaohui Wang, Hermann Grabert
We discuss the suppression of Coulomb charging effects on a small metallic island coupled to an electrode by a tunnel junction. At high temperatures the quantum corrections to the…
Diffeomorphism Invariant Integrable Field Theories and Hypersurface Motions in Riemannian Manifolds
Martin Bordemann, Jens Hoppe
We discuss hypersurface motions in Riemannian manifolds whose normal velocity is a function of the induced hypersurface volume element and derive a second order partial differentia…
Inclusive Charged Particle Distributions in Deep Inelastic Scattering Events at HERA
The ZEUS Collaboration
A measurement of inclusive charged particle distributions in deep inelastic scattering for centre-of-mass energies ~GeV and momentum transfer squared $10<…