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20212025
most citedNonequilibrium open quantum systems with multiple bosonic and fermionic environments: A hierarchical equations of motion approach

31 citations · 69 across the 6 of their papers we have counts for

collaborators

6 papers

cond-mat.mes-hall2025★ 1 cited

The Role of Quantum Vibronic Effects in the Spin Polarization of Charge Transport through Molecular Junctions

Samuel L. Rudge, Christoph Kaspar, Rudolf Smorka +3

The connection between molecular vibrations and spin polarization in charge transport through molecular junctions is currently a topic of high interest, with important consequences…

cond-mat.mes-hall2024★ 1 cited

Nonadiabatic Dynamics of Molecules Interacting with Metal Surfaces: A Quantum-Classical Approach Based on Langevin Dynamics and the Hierarchical Equations of Motion

Samuel L. Rudge, Christoph Kaspar, Robin L. Grether +3

A novel mixed quantum-classical approach to simulating nonadiabatic dynamics of molecules at metal surfaces is presented. The method combines the numerically exact hierarchical equ…

physics.chem-ph2022★ 24 cited

Nonequilibrium reaction rate theory: Formulation and implementation within the hierarchical equations of motion approach

Yaling Ke, Christoph Kaspar, André Erpenbeck +2

The study of chemical reactions in environments under nonequilibrium conditions has been of interest recently in a variety of contexts, including current-induced reactions in molec…

cond-mat.mes-hall2022

Nonadiabatic vibronic effects in single-molecule junctions: A theoretical study using the hierarchical equations of motion approach

Christoph Kaspar, André Erpenbeck, Jakob Bätge +2

The interaction between electronic and vibrational degrees of freedom is an important mechanism in nonequilibrium charge transport through molecular nanojunctions. While adiabatic…

cond-mat.mes-hall2021★ 12 cited

Efficient steady state solver for the hierarchical equations of motion approach: Formulation and application to charge transport through nanosystems

Christoph Kaspar, Michael Thoss

An iterative approach is introduced, which allows the efficient solution of the hierarchical equations of motion (HEOM) for the steady state of open quantum systems. The approach c…

cond-mat.stat-mech2021★ 31 cited

Nonequilibrium open quantum systems with multiple bosonic and fermionic environments: A hierarchical equations of motion approach

Jakob Bätge, Yaling Ke, Christoph Kaspar +1

We present a hierarchical equations of motion approach, which allows a numerically exact simulation of nonequilibrium transport in general open quantum systems involving multiple m…