126 citations · 624 across the 25 of their papers we have counts for
26 papers
Decoherence Time Scales and the Hörmander condition
Roman Schubert, Thomas Plastow
We consider an open quantum system described by the GKLS equation and we are interested in the onset of decoherence. We are in particulary interested in situations where only some…
Beyond Gaussian Quantum Channels: A model case
Daniel Speed, Wenyang Lyu, Roman Schubert
Gaussian quantum channels are well understood and have many applications, e.g., in Quantum Information Theory and in Quantum Optics. For more general quantum channels one can in ge…
Quantum-jump vs stochastic Schrödinger dynamics for Gaussian states with quadratic Hamiltonians and linear Lindbladians
Robson Christie, Jessica Eastman, Roman Schubert +1
The dynamics of Gaussian states for open quantum systems described by Lindblad equations can be solved analytically for systems with quadratic Hamiltonians and linear Lindbladians,…
Propagation of Gaussian beams in the presence of gain and loss
Eva-Maria Graefe, Alexander Rush, Roman Schubert
We consider the propagation of Gaussian beams in a waveguide with gain and loss in the paraxial approximation governed by the Schrödinger equation. We derive equations of motion fo…
Non-Hermitian propagation of Hagedorn wavepackets
Caroline Lasser, Roman Schubert, Stephanie Troppmann
We investigate the time evolution of Hagedorn wavepackets by non-Hermitian quadratic Hamiltonians. We state a direct connection between coherent states and Lagrangian frames. For t…
Classical and quantum dynamics in the (non-Hermitian) Swanson oscillator
Eva-Maria Graefe, Hans Jürgen Korsch, Alexander Rush +1
The non-Hermitian quadratic oscillator studied by Swanson is one of the popular -symmetric model systems. Here a full classical description of its dynamics is derived using rec…