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  • Lectures 09.03.2024 , München
    Anton Zeilinger:
    Zeilinger, Anton (09.03.2024) Impulsvortrag 2 zum Thema "Gott und Naturwissenschaft - ein Widerspruch?". Vortrag bei: Gesprächskreis „Kirche und Wissenschaft“ (Katholische Akademie in Bayern), München/GERMANY .

    Gesprächskreis „Kirche und Wissenschaft“

    Website

  • Page
    Black-Box Quantum Information Under Spacetime Symmetries
    ze the set of quantum correlations Q as depicted in the figure above -- in the special case of (2,2,2)-correlations, i.e. if we have 2 parties (Alice and Bob), each having a choice of 2 inputs and obtaining one of 2 possible outputs: Theorem. Every correlation that can be obtained under these two assumptions is a quantum correlation , i.e. can be realized within quantum theory. Furthermore, all (2,2,2)-quantum correlations can be realized under these two assumptions ...
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    Publications 1980 – 1989
    Optics Experiments Numerical Solution of a Nonlinear Schrödinger Equation for Neutron Optics Experiments Kamesberger J., A. Zeilinger Physica , B151 , 193 (1988) Website RIS ENW BIB Breakdown of Quantum Electrodynamics in (g-2) - Experiments? Breakdown of Quantum Electrodynamics in (g-2) - Experiments? Svozil K., A. Zeilinger Physica Scripta , T21 , 122 (1988) DOI Website Download RIS ENW BIB Quantum Implications, Essays in Honour of David Bohm. Invited Book Review. Quantum ...
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    Replacing quantum physicists with robots
    to characterize nonlocality and entanglement in 1D quantum systems [2, 3]. In two spatial dimensions or more, the marginal problem was essentially unexplored. Hence we attacked it. In [3] we find that the marginal problem in 2D can be solved for nearest-neighbor distributions when the random variables can just take d=3 possible values. It can also be solved for nearest-neighbor and next-to-nearest-neighbor distributions when d=2 . In such scenarios, it is possible to compute ...
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    Free-space Quantum Communication
    photon’s degrees of freedom, e.g. polarization and creation time. The Ursin group demonstrated this for the first time in 2017 over a 1.2 km link in Vienna [5]. An extension of the experiment with emphasis on noise resilience was carried out in 2019 [6]. [1] S.-K. Liao et al. , “Satellite-Relayed Intercontinental Quantum Network,” Phys. Rev. Lett. , vol. 120, no. 3, 2018. [2] S. P. Neumann et al. , “Q3Sat: quantum communications uplink to a 3U CubeSat — feasibility & ...
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    Quantum Effects and Gravity
    testing quantum physics on a macroscopic scale. Already in 2009, Rupert Ursin proposed the deployment of an entangled source on the ISS [1]. More recently, the Ursin group published a detailed mission proposal for testing decoherence effects in space [2]. Dropping and spinning sources A way to test the existence of quantum correlations on earth is to either let a source fall or spin it around really fast. Although these are definitely not the gentlest ways to handle such ...
  • Publications
    Focusing of Light in Axially Symmetric Systems within the Wave Optics Approximation
    Kofler, J. (2004). Focusing of Light in Axially Symmetric Systems within the Wave Optics Approximation. Retrieved from http://homepage.univie.ac.at/johannes.kofler/Files/Publications/Kofler%20(2004)%20-%20Focusing%20of%20Light.pdf
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    Fiber-based Quantum Communication
    experiment, in which we used color and timing correlations of a broad-band photon pair source, made it to the cover of Nature magazine in December 2018 [1]. In a collaboration with the University of Bristol, we have extended this experiment to 8 users [2]. Entanglement between Sicily and Malta This large-scale demonstration of entanglement distribution via glass fibers was conducted in a real-world scenario. Using efficient nanowire detectors, we showed that telecom fibers ...
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    Sources of Entanglement
    optimized for the near-infrared, making it especially useful for free-space applications [1]. Another important step towards standardization of source quality was the deployment of two separate crossed-crystal sources producing indistinguishable photons [2]. We also constructed an extremely rigid stand-alone source capable of surviving accelerations up to 30g [3]. Just recently, we demonstrated a completely new way of entanglement creation by utilizing the “HOM-interference” ...
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    Translating quantum systems in time
    then universal time translation is impossible. Hence, in [1, 2] we assume that the Hilbert space dimension of the target is known. To recap, a universal time translation process is a sequence of physical operations together with a measurement that, applied to any target quantum system of a given dimension, will time-translate the system in a non-trivial way, independently of how the target system reacts to each individual operation. In [1, 2] we find that the only possible ...