Journal ArticleDOI
Application of the time-dependent projection operator technique: The nonlinear quantum master equation
O. Linden,V. May +1 more
TLDR
In this article, the authors apply the time-dependent projection operator approach to a small system coupled to a reservoir and derive a closed nonlinear equation of motion for the reduced statistical operator of the small system.Abstract:
The time-dependent projection operator technique according to Willis and Picard (Phys. Rev. A 9 (1974) 1343) offers a unique quantum statistical description of two interacting subsystems. The technique is used here to go beyond the standard quantum master equation (QME) for a small system coupled to a reservoir. Applying the time-dependent projection operator approach, one is able to overcome a perturbational treatment of the system–reservoir coupling and can incorporate, (i) how the dynamics of the system may drive the reservoir out of the equilibrium, and (ii) how this nonequilibrium state reacts back on the system dynamics. The case of a reservoir of harmonic oscillators coupled linearly by its coordinates to the small system is studied in detail. The derivation of a closed nonlinear equation of motion for the reduced statistical operator of the small system is demonstrated. The method is used to describe the motion of a quantum particle in a molecular system, e.g. a tunneling electron or an exciton, which interacts strongly with its environment.read more
Citations
More filters
Journal ArticleDOI
Multi-layer multi-configuration time-dependent Hartree (ML-MCTDH) approach to the correlated exciton-vibrational dynamics in the FMO complex.
TL;DR: The coupled quantum dynamics of excitonic and vibrational degrees of freedom is investigated for high-dimensional models of the Fenna-Matthews-Olson complex and the question of the effect of initial state preparation is addressed.
Journal ArticleDOI
Multi-Layer Multi-Configuration Time-Dependent Hartree (ML-MCTDH) Approach to the Correlated Exciton-Vibrational Dynamics in the FMO Complex
TL;DR: In this paper, the coupling between local electronic transitions and vibrations is described within the Huang-Rhys model using parameters that are obtained by discretization of an experimental spectral density.
Journal ArticleDOI
On the non-stationary generalized Langevin equation
TL;DR: This work employs the formalism of time-dependent projection operator techniques to derive the equation of motion for a non-equilibrium trajectory-averaged observable as well as for its non-stationary auto-correlation function.
Journal ArticleDOI
Density matrix theory and computational aspects of quantum dynamics in active medium
DissertationDOI
Thermodynamics of Mesoscopic Quantum Systems: from a single qubit to light harvesting complexes
TL;DR: In this article, a modular dynamical semigroup approach is used to model mesoscopic quantum systems, which allows to postulate Markovian equations leading to a time-evolution preserving the positivity of the density matrix.
References
More filters
Book
Principles of Nonlinear Optical Spectroscopy
TL;DR: In this article, the authors present a simulation of the optical response functions of a multilevel system with relaxation in a multimode Brownian Oscillator Model and a wavepacket analysis of nonimpulsive measurements.
Book
Density Matrix Theory and Applications
TL;DR: In this article, the role of Orientation and Alignment in molecular processes is discussed, as well as the efficiency of a measuring device. But the authors do not discuss the application of their theory in the field of quantum mechanics.
Journal ArticleDOI
On Quantum Theory of Transport Phenomena Steady Diffusion
TL;DR: In this paper, a general formulation of the quantum theory of steady diffusion is given, where the boundary condition is taken into account by requiring that the solution should lead to a given distribution of average density.
Journal ArticleDOI
Memory Effects in Irreversible Thermodynamics
TL;DR: In this article, a new generalization of Onsager's theory of irreversible processes is presented to allow memory effects or causal time behavior, so that the response to a thermodynamic force comes later than the application of the force.
Journal ArticleDOI
Tensor propagator for iterative quantum time evolution of reduced density matrices. i: theory
Nancy Makri,Dmitrii E. Makarov +1 more
TL;DR: In this paper, the structure and properties of the propagator of a tensor tensor have been analyzed, and a simple eigenvector analysis reveals the nature of the dynamics and of the equilibrium state and directly yields quantum reaction or relaxation rates.
Related Papers (5)
Time-dependent projection-operator approach to master equations for coupled systems
C. R. Willis,R. H. Picard +1 more