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  • News
    Computational Advantage from Quantum-Controlled Ordering of Gates
    07.01.2015
    Quantum computation procedures are usually performed by applying gates in a fixed order. In the new publication "Computational Advantage from Quantum-Controlled Ordering of Gates" in Physical Review Letters, CoQuS student Mateus Araújo, CoQuS alumnus Fabio Costa and Časlav Brukner show that superimposing the order of gates might provide quantum computers with an additional computational advantage. Original Publication: Computational Advantage from Quantum-Controlled Ordering ...
  • News
    Error protected quantum bits entangled
    14.01.2021
    Even computers can miscalculate. Already small disturbances change stored information and corrupt results. That is why computers use methods to continuously correct such errors. In quantum computers, the vulnerability to errors can be reduced by storing quantum information in more than a single quantum particle. These logical quantum bits are less sensitive to errors. In recent years, theorists have developed many different error correction codes and optimized them for ...
  • News
    MICIUS PRIZE PRESENTED TO BLATT, ZEILINGER AND ZOLLER
    19.09.2019
    prizes were presented in the Chinese city of Hefei as part of the International Conference on Emerging Quantum Technology. Rainer Blatt received a Micius Prize for his pioneering experiments on quantum computers, and Peter Zoller, together with Juan Ignacio Cirac, for theoretical work on quantum computers. Anton Zeilinger and his former graduate student Jian-Wei Pan were recognized for their groundbreaking experiments on secure quantum communication over long distances. Five ...
  • News
    QuantumGain
    26.03.2024
    " QuantumGain - An Austrian deep tech, hidden champion for superconducting quantum computer hardware" is led by Philip Schmidt , a postdoctoral researcher in the research group of Markus Aspelmeyer at IQOQI Vienna, and will start in April. It is the only funded project from the last call that takes place at a non-university research institution, the Austrian Academy of Sciences. “Quantum computers, with their quantumbits, can be envisioned as a big orchestra. The quantumbits ...
  • News
    Hidden bridge between graph theory and quantum experiments uncovered
    08.03.2019
    colleagues to discover a novel, unexplored type of quantum interference which happens when many photons are involved. This quantum interference is the basis of a new special-purpose scheme of quantum computation, which can be exploited to solve Graph Theory questions that are intractable on a classical computer. This new connection between these seemingly unrelated fields also revealed new insights into quantum state generation with current photonic technology. In general, ...
  • News
    Quantum revolution takes a leap forward
    24.01.2020
    they were looking to manipulate. By cleverly shaping the spatial structure of the photon by means of carefully designed computer-generated holograms, they were able to achieve high quality transformations while maintaining maximal flexibility and versatility. “We hope that this experiment might trigger new pathways in the field of optical quantum communication and computation”, explains Assistant Professor (tenure track) Robert Fickler , group leader at Tampere University. ...
  • News
    Best-Thesis Award for Ämin Baumeler and Daniel Gruss
    01.10.2018
    Loops: Logically consistent correlations, time travel, and computation“. The thesis was conducted under the the supervision of Prof. Stefan Wolf at the Faculty of Informatics, Università della Svizzera italiana (USI), Lugano, Switzerland. In his work, Ämin Baumeler continues the works initialized by Fabio Costa, Ognyan Oreshkov and Časlav Brukner on non-causal correlations. That work was thereby extend to computer science, computability and time travel. The Thesis The Award ...
  • News
    Invitation to a talk by Jan-Ake Larsson on Wednesday, December 6th 2017, 15:00h
    06.12.2017
    A long-standing aim of quantum information research is to understand what gives quantum computers their advantage. Such an understanding would be of great benefit when attempting to build a quantum computer. Here we present a framework that uses classical resources but still is able to efficiently run, for example Deutsch-Jozsa and Simon's algorithms, and also can run Shor's factoring algorithm with some systematic errors. We also perform an experiment factoring 15 using ...
  • News
    Invitation to a talk: Andrew Garner
    12.09.2017
    Simulating the stochastic evolution of real quantities on a digital computer requires a trade-off between the precision to which these quantities are approximated, and the memory required to store them. The statistical accuracy of the simulation is thus generally limited by the internal memory available to the simulator. In this presentation, using tools from computational mechanics, I shall show that quantum information processing allows the simulation of stochastic ...
  • News
    Invitation to a talk: Gavin Brennen, Wednesday Feb. 21th 2018, 3:00 pm at the IQOQI Seminar Room
    21.02.2018
    market capitalization of several hundred billion US dollars, and while they are extremely volatile, some number of them are likely here to stay. With the development of quantum technology it is natural to ask how secure is Bitcoin to future quantum computer attacks. I'll introduce the basics of a Bitcoin transaction and describe the threat of quantum attacks on Proof of Work based mining and to digital signatures, as well as how to defend against them. Joint work with Divesh ...