Open quantum systems (OQSs) cannot always be described with the Markov approximation,
which requires a large separation of system and environment time scales. An overview is …

Femtosecond nonlinear spectroscopy is the main tool for the time-resolved detection of
photophysical and photochemical processes. Since most systems of chemical interest are …

An open quantum system refers to a system that is further coupled to a bath system
consisting of surrounding radiation fields, atoms, molecules, or proteins. The bath system is …

Half century has past since the pioneering works of Anderson and Kubo on the stochastic
theory of spectral line shape were published in J. Phys. Soc. Jpn. 9 (1954) 316 and 935 …

Reduced equations of motion for a two-level system strongly coupled to a harmonic
oscillators bath are constructed by extending the hierarchy of equations introduced by …

1. General Aspects 2. Normal-Mode Taylor Expansion 3. A Model of Nonadiabatic
Photoisomerization III. Time-Dependent Methodology A. Representation of the State Vector …

Multilayer multiconfiguration time-dependent Hartree (ML-MCTDH) theory is a rigorous and
powerful method to simulate quantum dynamics in complex many-body systems. This …

For a system strongly coupled to a heat bath, the quantum coherence of the system and the
heat bath plays an important role in the system dynamics. This is particularly true in the case …

The self-consistent hybrid approach [H. Wang, M. Thoss, and WH Miller, J. Chem. Phys. 115,
2979 (2001), preceding paper] is applied to the spin-boson problem with Debye spectral …

The reduced dynamics of a quantum system interacting with a linear heat bath finds an exact
representation in terms of a stochastic Schrödinger equation. All memory effects of the …