In the past 20 years, impressive progress has been made both experimentally and
theoretically in superconducting quantum circuits, which provide a platform for manipulating …

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 …

Chain-mapping techniques in combination with the time-dependent density matrix
renormalization group are a powerful tool for the simulation of open-system quantum …

We derive rigorous truncation-error bounds for the spin-boson model and its generalizations
to arbitrary quantum systems interacting with bosonic baths. For the numerical simulation of …

We present and analyze the fermionic time-evolving density matrix using orthogonal
polynomials algorithm (fTEDOPA), which enables the numerically exact simulation of open …

Excited state proton transfer is an ubiquitous phenomenon in biology and chemistry,
spanning from the ultrafast reactions of photobases and acids to light-driven, enzymatic …

Many numerical techniques for the description of quantum systems that are coupled to a
continuous bath require the discretization of the latter. To this end, a wealth of methods has …

We analyze the role of coherent, non-perturbative system-bath interactions in a
photosynthetic heat engine. Using the reaction-coordinate formalism to describe the …

We address propagation and entanglement of Gaussian states in optical media
characterised by nontrivial spectral densities. In particular, we consider environments with a …

Multitime system correlation functions are relevant in various areas of physics and science,
dealing with system-bath interaction including spectroscopy and quantum optics, where …