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  • News
    Researchers of IQOQI-Vienna win the PNAS Cozzarelli Prize with Melvin – the algorithm that creates new quantum experiments
    11.03.2019
    algorithm Melvin, which can automatically design new quantum experiments for which the human scientists had no answer until then [1]. Since then, several of these experiments have been successfully implemented in the laboratories of Zeilinger group [2-4]. Also, the unintuitive solutions of the algorithm have led to new ideas and connections in quantum physics [5,6]. In the more recent study “Active learning machine learns to create new quantum experiments” [7] the Viennese ...
  • Event
    Optomechanical cooling with coherent and squeezed light and frequency-dependent mirrors: The thermodynamic cost of opening the heat valve
    13.07.2023
    ground-state cooling can be achieved by driving the optical cavity with a coherent laser in the resolved-sideband regime [1]. I will first present a thermodynamic performance analysis of this optomechanical sideband cooling scheme in terms of a heat valve [2]. As performance quantifiers, we examine not only the lowest reachable effective temperature (phonon number) but also the evacuated-heat flow as an equivalent to the cooling power of a standard refrigerator, as well as ...
  • News
    Invitation to a talk: Denis Rosset, Wednesday Nov. 22nd 2017, 15:30h at the IQOQI Seminar Room
    22.11.2017
    relevant for quantum information processing. Our formulation leads naturally to the definition of a new class of experimental tests that (1) require minimal assumptions, (2) are robust against losses and (3) are able to discriminate any non-entanglement-breaking memory. Wednesday, November 22nd, 2017 , 15:30h IQOQI Seminar Room, 2 nd Floor, Boltzmanngasse 3, 1090 Vienna Hosted by: Caslav Brukner
  • News
    New computer inspired method of generating entanglement in the laboratory
    28.02.2017
    discovered by a computer algorithm [2]. The human part of our research team then analyzed the outputs of the computer program called MELVIN, and identified the trick, whereupon the generalizations presented were possible. It shows that computer programs that design new quantum experiments can provide inspiration for human scientists. [1] Mario Krenn, Armin Hochrainer, Mayukh Lahiri, Anton Zeilinger, Entanglement by Path Identity , Phys. Rev. Lett. 118 (8), 080401 (2017). [2] ...
  • Event
    WORKSHOP "ENTANGLEMENT QUANTIFICATION IN COLD GASES"
    03.02.2020
    ------------------------------------------------------ 2A) "Entanglement detection in spinor BECs", Philipp Kunkel, Martin Gärttner 2B) "Entanglement between identical particles is a useful and consistent resource", Benjamin Yadin 2C) "Towards an 'experimental minimum' to witness bipartite entanglement in many-body systems", Tommaso Roscilde 2D) "Constructing Bell inequalities for many-body systems: a data-driven approach" , Irénée Frérot 2E) "Extreme entanglement generation ...
  • News
    Invitation to a talk: Astrid Eichhorn, Tuesday Jan. 16th 2018, 12:00 pm at the IQOQI Seminar Room
    16.01.2018
    and matter, and "retrodict" some of the free parameters of the Standard Model of particle physics, such as, e.g., the values of the fine-structure constant and the masses of the heavy quarks. Tuesday, January 16 th , 2018 12:00 pm IQOQI Seminar room, 2 nd floor Boltzmanngasse 3, 1090 Vienna Hosted by: Philipp Höhn
  • News
    Invitation to a talk: Gavin Brennen, Wednesday Feb. 21th 2018, 3:00 pm at the IQOQI Seminar Room
    21.02.2018
    on Proof of Work based mining and to digital signatures, as well as how to defend against them. Joint work with Divesh Aggarwal, Troy Lee, Miklos Santha, Marco Tomamichel arXiv:1710.10377 Wednesday, February 21 th , 2018 3:00 pm IQOQI Seminar room, 2 nd floor Boltzmanngasse 3, 1090 Vienna Hosted by: Sukhbinder Singh
  • News
    Invitation to a talk: Jochen Rau, Thursday April 5th 2018, 12:00 noon at the IQOQI Seminar Room
    05.04.2018
    electrodynamics, the parallels between Maxwell’s equations and the Schrödinger equation; and in statistical mechanics, the information-theoretic underpinning of entropy, ensembles, and the second law. Thursday, April 5th, 2018 12:00 noon IQOQI Seminar room, 2nd floor Boltzmanngasse 3, 1090 Vienna Hosted by: Caslav Brukner
  • News
    Invitation to a talk: Nikola Paunkovic, Friday Nov. 10th 2017, 14:30h at the IQOQI Seminar Room
    10.11.2017
    two clients that requires no communication with the third trusted party during the Exchange phase. We discuss its fairness and show that it is possible to design such a protocol for which the probability of a dishonest client to cheat scales as N^{−1/2} , where N is the number of messages exchanged between the clients. Our protocol is not based on the exchange of signed messages: its fairness is based on the laws of quantum mechanics. Thus, it is abuse-free, and the clients ...
  • News
    In the limelight: NJP Highlights 2018
    29.03.2018
    required quantum probe states and measurements by introducing a resource that will prove helpful for numerous future research efforts in this area: the flexible 2D cluster states, which are useful for efficient sensing and measurement operations. [1] Time dilation in quantum systems and decoherence Igor Pikovski et al 2017 New J. Phys. 19 025011 [2] Obtaining tight bounds on higher-order interferences with a 5-path interferometer Thomas Kauten et al 2017 New J. Phys. 19 ...