9 papers · 1 filter
Tensor network methods for non-perturbative dynamics of open quantum systems
Thibaut Lacroix, Adam Burgess, Nicola Lorenzoni +11
The description of open quantum system dynamics beyond the perturbative treatment (usually associated with Markovian master equations) is a computationally challenging task due to…
Efficient construction of time-invariant process tensors for simulating high-dimensional non-Markovian open quantum systems
Ãmile Cochin, Jonathan Keeling, Brendon W. Lovett +1
Numerical methods for obtaining exact dynamics of non-Markovian open quantum systems are mostly limited to either small systems or to short-time evolution only. Here, we propose a…
Theory of dynamical superradiance in organic materials
Lukas Freter, Piper Fowler-Wright, Javier Cuerda +3
We develop the theory of dynamical superradiance -- the collective exchange of energy between an ensemble of initially excited emitters and a single-mode cavity -- for organic mate…
Fermionic versus Spin Baths in non-Interacting Transport Models
Muhammad Zia, Moritz Cygorek, Erik M. Gauger +1
We investigate how fermionic anticommutation shapes transport in a noninteracting resonant-level model where a single central site is coupled to an environment. To this end, we com…
Connectivity matters: Impact of bath modes ordering and geometry in open quantum system simulation with Tensor Network States
Thibaut Lacroix, Brendon W. Lovett, Alex W. Chin
Being able to study the dynamics of quantum systems interacting with several environments is important in many settings ranging from quantum chemistry to quantum thermodynamics, th…
Tree-like process tensor contraction for automated compression of environments
Moritz Cygorek, Brendon W. Lovett, Jonathan Keeling +1
The algorithm "automated compression of environments" (ACE) [Nat. Phys. 18, 662 (2022)] provides a versatile way of simulating an extremely broad class of open quantum systems. Thi…