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  • Event
    The challenge of teaching quantum physics to non-physicists
    10.05.2022
    me conveyed with as little math and as few references to other areas of physics as possible – without trivializing or oversimplifying the subject. In this talk, I report on first experiences with a (still ongoing) course on quantum technology for computer scientists and engineers at RheinMain University of Applied Sciences. I will discuss the overall approach, the selection of topics, as well as the use of demonstration experiments, visualizations, and online games and ...
  • News
    FQXi 2018 "Agency in the Physical World"
    13.11.2018
    These are: "Agents in superpositions: the covariance of physical laws in quantum reference frames" by Caslav Brukner, "Where agents and algorithms meet: free will and computational irreducibility" by Markus Mueller and Andrew Garner, and "Agency-dependent spacetime and spacetime-dependent agency" by Giovanni Amelino-Camelia (University of Naples Federico II) and Philip Höhn (IQOQI). All the awardees can be found here: https://fqxi.org/grants/large/awardees/list?year=2018 ...
  • Event
    Horizons Decohere Quantum Superpositions
    06.07.2023
    “soft gravitons / photons” through the horizon. This enables the horizon to harvest “which path” information about the superposition. We estimate the decoherence time for such quantum superpositions in the presence of (Killing) horizons. Finally, we compute the quantum information content (viz. fidelity) of the superposed graviton / photon field in the black hole interior, and give a direct relationship between the information accessible by any optimal observer(s) in the ...
  • News
    Prestigious Chinese science award goes to five Academy members
    29.04.2019
    University of Vienna and the Academy. Rainer Blatt (University of Innsbruck and OeAW) is receiving the prize for his seminal experiments on quantum computers, and Peter Zoller (University of Innsbruck and OeAW) along with his former Innsbruck colleague Juan Ignacio Cirac (Max Planck Institute for Quantum Optics) for key theoretical work on quantum computers. Anton Zeilinger (University of Vienna and OeAW) and his former graduate student Jian-Wei Pan (University of Science ...
  • News
    The future of quantum technologies
    04.03.2019
    s of the 20th century. In particular, the quantum information theory has developed into a very broad area of research, which is visible far beyond its borders. A prominent example is the intensive research that has led to algorithms for quantum computers in recent decades. Besides the advances have paved the way for secure data transfer methods and proposals for classical and quantum mechanical machine learning. Despite these developments, current devices for quantum ...
  • News
    Unlimited non-causal correlations and their relation to non-locality
    30.03.2022
    In stark contrast to scenarios where a single region influences its own causal past, some processes that distribute non-causal correlations satisfy a series of natural desiderata: logical consistency, linear and reversible dynamics, and computational tameness. Here, we present such processes among arbitrary many regions where each region influences every other but itself, and show that the above desiderata are altogether insufficient to limit the amount of "acausality" ...
  • Event
    Playing with Bob's toys to quantize gravity
    24.11.2022
    quantum gravity should be closely aligned to quantum information theory. In this paper, we present a way in which this connection can be made exact, by writing the spin-networks of loop quantum gravity (LQG) in the ZX-diagrammatic language of quantum computation.
  • Event
    Contextuality in composite systems: entanglement vs. the Kochen-Specker theorem
    16.11.2021
    understanding of the relationship between unentangled Gleason and KS theorems on multiqudit systems in general. Time permitting, I will also discuss some implications of these results for the role of contextuality as a resource for multiqubit quantum computation with state injection. Based on arXiv:2109.13594.
  • News
    CoQuS Summer School 2015
    26.03.2015
    Atomic and Subatomic Physics (ATI) in the week of 21 - 25 September 2015. Confirmed Speakers Ataç İmamoğlu ( ETH, SUI ) | Solid State Devices Dieter Jaksch ( Oxford, UK ) | Quantum Simulation s John Martinis ( UCSB/Google, USA ) | Adiabatic Quantum Computation Florian Marquardt ( Erlangen, GER ) | Topology in Quantum Optics Christine Silberhorn ( Paderborn, GER ) | Modern Topics in Photonics More information on the CoQuS Summer School 2015.
  • News
    "Qutrit": Complex quantum teleportation achieved for the first time
    19.08.2019
    extended to any number of dimensions, as Erhard emphasizes. Higher information capacities for quantum computers With this, the international research team has also made an important step towards practical applications such as a future quantum internet, since high-dimensional quantum systems can transport larger amounts of information than qubits. "This result could help to connect quantum computers with information capacities beyond qubits", says Anton Zeilinger, quantum ...