52 citations · 111 across the 3 of their papers we have counts for
5 papers
Generalization of the hierarchical equations of motion theory for efficient calculations with arbitrary correlation functions
Tatsushi Ikeda, Gregory D. Scholes
The hierarchical equations of motion (HEOM) theory is one of the standard methods to rigorously describe open quantum dynamics coupled to harmonic environments. Such a model is use…
Modeling and analyzing a photo-driven molecular motor system: Ratchet dynamics and non-linear optical spectra
Tatsushi Ikeda, Arend G. Dijkstra, Yoshitaka Tanimura
A light-driven molecular motor system is investigated using a multi-state Brownian ratchet model described by a single effective coordinate with multiple electronic states in a dis…
Low-Temperature Quantum Fokker-Planck and Smoluchowski Equations and Their Extension to Multistate Systems
Tatsushi Ikeda, Yoshitaka Tanimura
Simulating electron-nucleus coupled dynamics poses a non-trivial challenge and an important problem in the investigation of ultrafast processes involving coupled electronic and vib…
Phase-space wavepacket dynamics of internal conversion via conical intersection: Multi-state quantum Fokker-Planck equation approach
Tatsushi Ikeda, Yoshitaka Tanimura
We theoretically investigate internal conversion processes of a photoexcited molecule in a condensed phase. The molecular system is described by two-dimensional adiabatic ground an…
Analysis of 2D THz-Raman spectroscopy using a non-Markovian Brownian oscillator model with nonlinear system-bath interactions
Tatsushi Ikeda, Hironobu Ito, Yoshitaka Tanimura
We explore and describe the roles of inter-molecular vibrations employing a Brownian oscillator (BO) model with linear-linear (LL) and square-linear (SL) system-bath interactions,…