title: Probing Dynamics and Correlations in Cold-Atom Quantum Simulators
creator: Geier, Kevin Thomas
subject: ddc-530
subject: 530 Physics
description: Cold-atom quantum simulators offer unique possibilities to prepare, manipulate, and probe quantum many-body systems.  However, despite the high level of control in modern experiments, not all observables of interest are easily accessible.  This thesis aims at establishing protocols to measure currently elusive static and dynamic properties of quantum systems.  The experimental feasibility of these schemes is illustrated by means of numerical simulations for relevant applications in many-body physics and quantum simulation.  In particular, we introduce a general method for measuring dynamical correlations based on non-Hermitian linear response.  This enables unbiased tests of the famous fluctuation-dissipation relation as a probe of thermalization in isolated quantum systems.  Furthermore, we develop ancilla-based techniques for the measurement of currents and current correlations, permitting the characterization of strongly correlated quantum matter.  Another application is geared towards revealing signatures of supersolidity in spin-orbit-coupled Bose gases by exciting the relevant Goldstone modes.  Finally, we explore a scenario for quantum-simulating post-inflationary reheating dynamics by parametrically driving a Bose gas into the regime of universal far-from-equilibrium dynamics.  The presented protocols also apply to other analog quantum simulation platforms and thus open up promising applications in the field of quantum science and technology.
date: 2022
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/32051/1/Dissertation_Geier_KevinThomas.pdf
identifier: DOI:10.11588/heidok.00032051
identifier: urn:nbn:de:bsz:16-heidok-320516
identifier:   Geier, Kevin Thomas  (2022) Probing Dynamics and Correlations in Cold-Atom Quantum Simulators.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/32051/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng