178 citations · 292 across the 9 of their papers we have counts for
9 papers
On the Evolution of States in a Quantum-Mechanical Model of Experiments
Jürg Fröhlich, Zhou Gang
The postulates of von Neumann and Lüders concerning measurements in quantum mechanics are discussed and criticized in the context of a simple model proposed by Gisin. The main purp…
Lie-Schwinger block-diagonalization and gapped quantum chains: analyticity of the ground-state energy
S. Del Vecchio, J. Fröhlich, A. Pizzo +1
We consider quantum chains whose Hamiltonians are perturbations by interactions of short range of a Hamiltonian that does not couple the degrees of freedom located at different sit…
Lie-Schwinger block-diagonalization and gapped quantum chains with unbounded interactions
S. Del Vecchio, J. Fröhlich, A. Pizzo +1
We study quantum chains whose Hamiltonians are perturbations by interactions of short range of a Hamiltonian that does not couple the degrees of freedom located at different sites…
Quantitative Bounds on the Rate of Approach to Equilibrium for some One-Dimensional Stochastic Non-Linear Schrödinger Equations
Eric A. Carlen, Jürg Fröhlich, Joel Lebowitz +1
We establish quantitative bounds on the rate of approach to equilibrium for a system with infinitely many degrees of freedom evolving according to a one-dimensional focusing nonlin…
Semi-Classical Dynamics in Quantum Spin Systems
J. Froehlich, A. Knowles, E. Lenzmann
We consider two limiting regimes, the large-spin and the mean-field limit, for the dynamical evolution of quantum spin systems. We prove that, in these limits, the time evolution o…
Magnetism and the Weiss Exchange Field - A Theoretical Analysis Inspired by Recent Experiments
C. Albert, L. Ferrari, J. Froehlich +1
The huge spin precession frequency observed in recent experiments with spin-polarized beams of hot electrons shot through magnetized films is interpreted as being caused by Zeeman…