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  • News
    2018 Entropy Young Investigator Award
    12.04.2018
    Briegel. In 2017 he started a senior postdoc position in Marcus Huber’s group at IQOQI Vienna. Dr. Friis’s research interests lie in the overlap of quantum information and computation with quantum optics and quantum thermodynamics. Currently, his research is aimed at investigating the connections between resources for quantum computation, quantum metrology, and quantum thermodynamics, in particular the energy cost of creating correlations and entanglement, and the ...
  • News
    Ideal measurements in quantum mechanics have infinite resource costs
    14.01.2020
    approximate good measurements large amounts of work need to be expended. These insights underline the relevance of incorporating the work cost of measurement imperfection to estimate the efficiency of quantum information-based engines and quantum computers.
  • Event
    From Niels Bohr to John Wheeler to QBism: The trajectory of an interpretation of quantum mechanics
    26.09.2023
    named “Is It Autonomy All the Way Down? The Search for a QBist Metaphysic”. Bibliography: CALUDE, Cristian S (Org.). The Human Face of Computing. (2016). Imperial College Press. London, UK. FUCHS, Christopher A. (2011). Coming of Age with Quantum Information: Notes on a Paulian Idea. Cambridge, UK, Cambridge University Press. GOLDSTINE, H. H. (1980). The Computer from Pascal to von Neumann. Princeton University Press. Princeton, USA. WHEELER, J. A.; FORD, Kenneth. (1998). ...
  • News
    Fingerprints of quantum entanglement
    15.02.2018
    goal of quantum information science is to develop a quantum computer, a fully-fledged controllable device which makes use of the quantum states of subatomic particles to store information. As with all quantum technologies, quantum computing is based on a peculiar feature of quantum mechanics, quantum entanglement. The basic units of quantum information, the qubits, need to correlate in this particular way in order for the quantum computer to achieve its full potential. One ...
  • News
    Into the radial modes of light
    09.03.2018
    number of rings, these modes are routed to the two different outputs. For example, even and odd number of rings can be distinguished. The trick here is to achieve a ring-number dependent phase. The physical realization was found with the help of the computer algorithm Melvin [2]. The scientists use a geometric phase that accumulates during propagation through lens systems. This so-called Gouy phase can be chosen with a specific arrangement of lenses such that, for example, ...
  • News
    One step closer to complex quantum teleportation
    07.11.2018
    membership magazine of the American Institute of Physics: https://goo.gl/MH2zDg . Similar to bits in conventional computers, QuBits are the smallest unit of information in quantum systems. Big companies like Google and IBM are competing with research institutes around the world to produce an increasing number of entangled QuBits. The clear motivation is to develop a functioning quantum computer. A research group at the University of Vienna and the Austrian Academy of ...
  • Event
    Correlations with subsystem constraints
    28.09.2018
    present some results on the characterization of general correlations with subsystem constraints, as well as of their composition and decomposition. The results allow one to generalize the previously studied process matrices and higher-order maps of computation. Some conceptual implications on causal reference frames and the physical realizability of correlations with indefinite causal structure are discussed.
  • News
    Invitation to a talk: Juan Bermejo-Vega, Wednesday, July 18th 2018, 11 am at the IQOQI Seminar Room
    18.07.2018
    A near-term goal in the field of quantum computation is to realize a minimal device showing a quantum speedup (sometimes dubbed "quantum computational supremacy" or "quantum advantage"). The goal here is to perform a proof-of-principle experiment whose outcome cannot efficiently be predicted on a classical computer. In this talk, we will propose simple quantum simulation architectures that show a quantum speedup in a complexity theoretic sense. Specifically, we consider the ...
  • Event
    A modern account of Maxwell´s demon
    12.10.2022
    The aim of this talk is to present these advancements in a unified manner, taking a radical stance on the identification of reversible computation and ideal thermodynamics. In particular, starting from the analysis of the Szilárd's engine, after the introduction of the Landauer's principle, we explain in detail how one is naturally lead to consider algorithmic complexity in order to ensure the validity of the second law (an argument already given by Zurek in the 80's, but ...
  • Event
    Composable security in relativistic quantum cryptography
    02.11.2021
    sufficient to construct oblivious transfer, composing specific relativistic protocols in this way is known to be insecure. A composable framework is required to perform such a modular security analysis, but no known frameworks can handle models of computation in Minkowski space. By instantiating the systems model from the Abstract Cryptography framework with Causal Boxes, we obtain such a composable framework, in which messages are assigned a location in Minkowski space (or ...