Archives: Events

Speaker: Ana Costa (Federal University of Paraná) Abstract Verifying entanglement between parties is essential for creating a secure quantum network, and Bell tests are the most rigorous method for doing so. However, if there is any signalling between the parties, then the violation of these inequalities can no longer be used to draw conclusions about […]

Speaker: Adamantia Zampeli (Universidad Nacional Autónoma de México, Morelia) Abstract In this talk, I will introduce the main elements and ideas of the general boundary formulation [R. Oeckl. A local and operational framework for the foundations of physics. Advances in Theoretical and Mathematical Physics, 23(2):437–592, 2019. arXiv: 1610.09052.]. This is a formalism inspired by quantum […]

Speaker: Robert Spekkens (Perimeter Institute for Theoretical Physics) Abstract Can the effectiveness of a medical treatment be determined without the expense of a randomized controlled trial? Can the impact of a new policy be disentangled from other factors that happen to vary at the same time? Questions such as these are the purview of the […]

Speaker: Paweł Rykała  (Faculty of Physics, UJ)

Speaker: Adam Burchard (Amsterdam) Abstract Graph states are a cornerstone of quantum information theory. Existing invariants characterizing the local Clifford (LC) equivalence classes of graph states are however computationally inefficient and call for a more tractable approach. This paper introduces the foliage partition, an easy-to-compute LC-invariant of computational complexity O(n^3) in the number of qubits. […]

Speaker: Lajos Diósi (Wigner Research Center for Physics & Eötvös Loránd University) Abstract Quantum gravity has not yet obtained a usable theory. We apply the semiclassical theory instead, where the space-time remains classical (i.e.: unquantized). However, the hybrid quantum-classical coupling is acausal, violates both the linearity of quantum theory and the Born rule as well. […]

Speaker: Masaya Takahashi (CFT-PAN) Abstract I will talk about the studies on the creation and destruction of coherence by quantum channels. First, we will see how decoherence appears in matrix form through an example of a phase-damping channel on one qubit. This provides a qualitative perspective, serving as a good starting point. Next, we will […]

Speaker: Frederik vom Ende (Freie Universität Berlin)

Speaker: Giovanni Scala (ICTQT - Univerisity of Gdańsk) Abstract Uncertainty relations express limits on the extent to which the outcomes of distinct measurements on a single state can be made jointly predictable. The existence of nontrivial uncertainty relations in quantum theory is generally considered to be a way in which it entails a departure from […]

Speaker: Jan Kołodyński (Centre of New Technologies (CeNT), University of Warsaw) Abstract From gravitational-wave detectors to cryogenically cooled nanoresonators, quantum effects have been shown to enhance capabilities of various devices in sensing external perturbations. Although this fact has led to important breakthroughs in the field of quantum metrology, one often forgets that the vast majority […]