IWNET12
IWNET12
Open quantum systems coupled to classical time-evolving environ-
ments
Maksym Osmanov1
1 ETH Zurich, Polymer Physics group
Abstract
The theory of quantum systems coupled to their environments has fundamental interest (the measurement
problem, the quantum-classical crossover etc.) as well as practical applications (e. g. quantum computers) [1].
We investigate quantum systems coupled to time-dependent classical environments using the nonlinear ther-
modynamic master equation [2]. We demonstrate how large the inuence of nonlinearity is by comparing our
results with linear master equations.
We show how dynamics of a classical environment aects quantum properties of a system, such as the coherence
and the entanglement as well as the energy and how it can be used to control them. We also show how
the feedback changes the classical evolution. We answer a highly debated question whether quantum systems
coupled to non-equilibrium thermodynamic environments can be considered as non-Markovian or not.
References
[1] H. P. Breuer and F. Petruccione: The theory of open quantum systems, Clarendon press, Oxford, 2010
[2] Öttinger, H.C.: Nonlinear thermodynamic quantum master equation: Properties and examples. Phys. Rev.
A 82
E-mail: maksym.osmanov@mat.ethz.ch