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 …

Molecular polaritons are the optical excitations which emerge when molecular transitions
interact strongly with confined electromagnetic fields. Increasing interest in the hybrid …

Quantum‐classical formulations of reactive flux correlation functions require the partial Weyl–
Wigner transform of the thermalized flux operator, whose numerical evaluation is unstable …

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 …

A contemporary review on the behavior of driven tunneling in quantum systems is
presented. Diverse phenomena, such as control of tunneling, higher harmonic generation …

The flux formulation of reaction rate theory is recast in terms of the expectation value of the
reactive flux with an initial condition that corresponds to a non-equilibrium, factorized …

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 …

Ultrafast energy transfer is used to transmit electronic excitation among the many molecules
in photosynthetic antenna complexes. Recent experiments and theories have highlighted …

Coherence refers to correlations in waves. Because matter has a wave-particle nature, it is
unsurprising that coherence has deep connections with the most contemporary issues in …

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