ProjectKinetically constrained dynamics in quantum gases

Basic data

Kinetically constrained dynamics in quantum gases
01/06/2023 to 31/05/2027
Abstract / short description:
This project aims to break new ground in the understanding of
complex dynamics that is displayed by kinetically constrained
quantum systems. These are many-body models which were
originally conceived in the study of classical glassy systems in which
relaxation can become so slow that the stationary state cannot be
reached on experimentally accessible time scales. They are often
formulated in terms of spin ensembles, where the change of the state
of a given spin is conditioned on the presence of a particular spin
configuration within its neighbourhood. The understanding of quantum
generalisations of kinetically constrained systems is still in its infancy,
partly due to the fact that studying quantum mechanical systems
becomes exponentially more costly with growing size, when
compared with their classical counterpart. In this project we will
construct and analyse quantum many-body systems with kinetic
constraints and propose experimental realisations for them. We will
on the one hand utilise advanced numerical methods, based on
tensor networks, which will shed light on the connection between
relaxation dynamics of kinetically constrained spin systems and the
spectral properties of their dynamical generator as well as the time
evolution of spatio-temporal quantum and classical correlations. On
the other hand, we will develop and put into use a framework for the
investigation of dynamical phase transitions, which is based on large
deviation methods and the concept of time-integrated order
parameters. Moreover, we will formulate and analyse kinetically
constrained models which will be experimentally realised within our
Research Unit, and which are based on a cold atomic quantum gas
involving two species. We expect that our research results will lead to
a significant advance in our understanding of relaxation processes in
open and closed quantum matter as well as in the characterisation of
complex dynamical phases. Moreover, our work will yield novel
numerical and analytical tools which will benefit the research
community as a whole.
quantum optics
cold atoms
kalte Atome
statistische Physik

Involved staff


Institute for Theoretical Physics (ITP)
Department of Physics, Faculty of Science

Other staff

Institute for Theoretical Physics (ITP)
Department of Physics, Faculty of Science

Local organizational units

Institute for Theoretical Physics (ITP)
Department of Physics
Faculty of Science


Bonn, Nordrhein-Westfalen, Germany

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