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  • Event
    The value of lacking complexity in quantum computation
    12.07.2023
    A state’s complexity quantifies the difficulty of preparing the state from a simple tensor product, or the difficulty of uncomputing the state to a simple tensor product. The greater a state’s distanc
  • News
    Boris Tsirelson
    17.06.2014
    coalition. New progress in quantum Bell-type inequalities (namely, their large-scale theory) is made in the current decade (2010-…) by mathematicians (Marius Junge, Carlos Palazuelos, David Perez-Garcia, Oded Regev, William Slofstra, Michael Wolf) and computer scientists (Harry Buhrman, Thomas Vidick, Ronald de Wolf). At last, mathematicians agree that this is math. Ironically, since then I am an expert in this topic no more. In addition, an anecdote from my youth. In 1965, ...
  • News
    Algorithm determines new blueprint for quantum systems
    21.08.2020
    With the help of the computer algorithm Melvin, quantum researchers from the Austrian Academy of Sciences and the University of Vienna have developed a new approach to manipulate complex constellations of entangled light particles in a targeted manner. The method published in the journal "Physical Review Letters" could prove to be extremely valuable for the creation of quantum computers.
  • Event
    A fast Ge spin qubit read-out with RF reflectometry
    10.02.2025
    Currently, those exceptional characteristics are scattered among different spin-qubit platforms. This is where hole spin qubits in Ge could come up as a solution. Due to their large spin-orbit couplin
  • News
    Do “Schrödinger cat-states” occur naturally
    15.12.2017
    The quantum superposition principle allows adding (superimposing) arbitrary physical states, no matter how “different” they are. This was the starting point for Erwin Schrödinger, back in 1935, to int
  • Seite
    Publications 2020 – 2024
    nt Distillation Ecker S., P. Sohr, L. Bulla, M. Huber, M. Bohmann, R. Ursin Physical Review Letters , 127 , 040506 (2021) DOI Webseite RIS ENW BIB Demonstrating the power of quantum computers, certification of highly entangled measurements and scalable quantum nonlocality Demonstrating the power of quantum computers, certification of highly entangled measurements and scalable quantum nonlocality Baumer E., N. Gisin, A. Tavakoli NPJ QUANTUM INFORMATION , 7 , ARTN 117 (2021) ...
  • Seite
    Information Processing
    Computer science and physics are intertwined: A physical process can be understood as information processing, and limits on information processing restrict physical theories. We exploit this synergy in order to better understand the role of causality for information processing. The main question we ask is how causality limits information processing. A model where the standard notion of causality is violated might allow for more efficient information processing or might even ...
  • Seite
    Quantum Entanglement in High-Dimensional Systems
    onal space. Artistic view of a computer algorithm is designing a quantum experiment (Image by Robert Fickler). The generation of complex high-dimensional quantum states is difficult in the laboratory. This is not only due to the strict technological requirements, but mostly because of the contra-intuitive quantum physical phenomena. Thus in many situations it is not even clear how to construct such quantum experiments. For that reason, we have developed a computer algorithm, ...
  • Seite
    Mission Statement
    Akademie der Wissenschaften betreiben theoretische und experimentelle Forschung zu den Grundlagen der Quantenphysik, Quanteninformation und Raum-Zeit-Physik und erforschen neue Möglichkeiten für den Bau von Geräten für Quantenkommunikation und Quantencomputern. IQOQI Vienna bringt eine informationstheoretische Perspektive und einen fundamentalen Fokus in physikalische Fragestellungen ein, mit dem Ziel, die Quantenphysik besser zu verstehen, sie mit anderen physikalischen ...
  • Seite
    2016
    we use pseudo-randomness produced by Turing machines or true randomness. To prove their point, the authors identify situations in which ensembles of quantum states defining the same mixed state become arbitrarily distinguishable when prepared by a computer. Their work also points out a new loophole in the violation of Bell inequalities, stemming from the use of pseudorandom number generators to choose the measurement settings. Selection committee 2016: Alain Aspect, Institut ...