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  • Page
    Reconstructions of Quantum Theory
    strategy (it is taken from another publication [3] and the labelling is not exactly fitting, but the overall strategy is the same). For the details, see our paper [1] or the Les Houches lecture notes [2]. We start by considering a generalized bit in a GPT that satisfies our postulates, i.e. a system with n=2 distinguishable states. A priori, its state space could be described by any convex set of any dimension d (top left). However, the subspace axiom gives us some ...
  • Page
    Quantum Entanglement in High-Dimensional Systems
    in more than 100 dimensions [1]. Furthermore, quantum entanglement with up to 10010ħ of angular momentum has been achieved in our labs, showing that systems with very large quanta can still possess the puzzling properties of the quantum world [2]. Figure 2: Demonstration of high-order OAM mode generation with SPMs and an intense laser. In parallel to increasing the dimensionality of the quantum systems, we also increase the complexity of those. We do so by simultaneously ...
  • Page
    Quantum Theory on Indefinite Causal Structures
    called causally separable if it can be decomposed as a convex combination of causally ordered processes, otherwise it is causally nonseparable. Recently, we have developed a method for certifying causal separability, which is based on “causal witnesses” [2, see also our video ]. Causally nonseparable processes can rise to correlations that can violate “causal inequalities” which are satisfied if the events are ordered according to a fixed causal order [1,3]. This is a direct ...
  • Publications
    Sublimation enthalpy of dye molecules measured using fluorescence
    Stefanov, A., Stibor, A., Clarimon, A. D., & Arndt, M. (2004). Sublimation enthalpy of dye molecules measured using fluorescence. J. Of Chem. Phys., 121, 6935 – 6940.
  • Page
    Macroscopic Entanglement Witnesses
    xxx-Heisenberg spin-1/2 (a, top) and spin 1 (b, bottom) chains. The black solid curves are temperature dependences of the zero-field magnetic susceptibilities per particle and the red curves are “entanglement witnesses”. All points below of the intersection points to the left (below the critical temperatures) indicate the existence of entanglement in the solids. [1] Č. Brukner and V. Vedral, Macroscopic Thermodynamical Witnesses of Quantum Entanglement, Preprint at ...
  • Lectures 09.03.2023 , Las Vegas
    Gerhard Kirchmair:
    Kirchmair, G. (09.03.2023) 2. Coherent control of multi-Qubit dark states in Waveguide QED. Vortrag bei: APS March Meeting 2023, Las Vegas/UNITED STATES.

    APS March Meeting 2023
  • Lectures 28.06.2016 , Hamburg
    Manfred Mark:
    Mark, M. J. (28.06.2016) Quantum simulation 2.0: Quench dynamics and long-range extensions in the Bose-Hubbard model. Vortrag bei: CUI Young Researchers Workshop on "From few- to many-body physics in cold atomic quantum matter", Hamburg/GERMANY.

    CUI Young Researchers Workshop on "From few- to many-body physics in cold atomic quantum matter"
  • Lectures 22.10.2012 , Dresden

    Lechner, W. (22.10.2012) Defect Interactions and Quantum Glass in 2D Crystals. Vortrag bei: Seminar talk in the group of T. Pohl, MPI Dresden, Dresden/GERMANY.

    Seminar talk in the group of T. Pohl, MPI Dresden
  • Lectures 18.10.2012 , Innsbruck, Austria

    Lechner, W. (18.10.2012) Quantum Glass in 2D. Vortrag bei: Rydberg Ion Meeting, Innsbruck, Austria/AUSTRIA.

    Rydberg Ion Meeting
  • Lectures 06.07.2016 , ICFO

    Romero-Isart, O. (06.07.2016) (2 Lectures) Levitated optomechanics. Vortrag bei: ICFO schools on the frontiers of light: Master School on Quantum Nano- and Opto-mechanics, ICFO/SPAIN.

    ICFO schools on the frontiers of light: Master School on Quantum Nano- and Opto-mechanics