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- Centre National de la Recherche ScientifiqueFR238 papers
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8 papers · 2 filters
Quantum Equivalence Principle
H. Kleinert
A simple mapping procedure is presented by which classical orbits and path integrals for the motion of a point particle in flat space can be transformed directly into those in curv…
q-oscillators, (non-)Kaehler manifolds and constrained dynamics
Sergei V. Shabanov
It is shown that q-deformed quantum mechanics (systems with q-deformed Heisenberg commutation relations) can be interpreted as an ordinary quantum mechanics on Kaehler manifolds, o…
Stability of 3D Cubic Fixed Point in Two-Coupling-Constant ϕ^4-Theory
H. Kleinert, S. Thoms, V. Schulte-Frohlinde
For an anisotropic euclidean -theory with two interactions $[u (\sum_{i=1^M ϕ_i^2)^2+v \sum_{i=1}^M ϕ_i^4]$ the -functions are calculated from five-loop perturbation expans…
Convergence Behavior of Variational Perturbation Expansions
Wolfhard Janke, Hagen Kleinert
Variational weak-coupling perturbation theory yields converging approximations, uniformly in the coupling strength. This allows us to calculate directly the coefficients of `strong…
On the Influence of Pulse Shapes on Ionization Probability
C. Figueira de Morisson Faria, A. Fring, R. Schrader
We investigate analytical expressions for the upper and lower bounds for the ionization probability through ultra-intense shortly pulsed laser radiation. We take several different…
Classical and Fluctuating Paths in Spaces with Curvature and Torsion
H. Kleinert
This conference talk elaborates on a recently discovered mapping procedure by which classical orbits and path integrals for the motion of a point particle in flat space can be tran…