105 citations · 292 across the 13 of their papers we have counts for
13 papers
Toppling pencils -- Macroscopic Randomness from Microscopic Fluctuations
Thomas Dittrich, Santiago Peña Martínez
We construct a microscopic model to study discrete randomness in bistable systems coupled to an environment comprising many degrees of freedom. A quartic double well is bilinearly…
Quantum Chaos and Quantum Randomness - Paradigms of Entropy Production on the Smallest Scales
Thomas Dittrich
Quantum chaos is presented as a paradigm of information processing by dynamical systems at the bottom of the range of phase-space scales. Starting with a brief review of classical…
Punchets: nonlinear transport in Hamiltonian pump-ratchet hybrids
Thomas Dittrich, Nicolás Medina Sánchez
"Punchets" are hybrids between ratchets and pumps, combining a spatially periodic static potential, typically asymmetric under space inversion, with a local driving that breaks tim…
Non-adiabatic pumping in an oscillating-piston model
Maya Chuchem, Thomas Dittrich, Doron Cohen
We consider the prototypical "piston pump" operating on a ring, where a circulating current is induced by means of an AC driving. This can be regarded as a generalized Fermi-Ulam m…
Nonclassical phase-space trajectories for the damped harmonic quantum oscillator
Leonardo A. Pachon, Gert-Ludwig Ingold, Thomas Dittrich
The phase-space path-integral approach to the damped harmonic oscillator is analyzed beyond the Markovian approximation. It is found that pairs of nonclassical trajectories contrib…
Directed transport in a ratchet with internal and chemical freedoms
Thomas Dittrich, Nestor A. Naranjo
We consider mechanisms of directed transport in a ratchet model comprising, besides the external freedom where transport occurs, a chemical freedom that replaces the familiar exter…