Uncertainty bounds

Date: Monday, April 17, 2023
Time: 14:15
Host: Quantum Chaos and Quantum Information (Jagiellonian University)
Passcode: please contact albertrico23 at gmail.com
Speaker: Moises Bermejo Moran (Jagiellonian University) Abstract I will review different kind of uncertainty relations and their significance in Quantum Information, e.g. for entanglement and non-locality characterization. Then I will explain how to obtain (theoretically tight) bounds for these relations using the framework of state polynomial optimization.

Work extraction from unknown quantum sources

Date: Tuesday, April 18, 2023
Time: 11:15
Host: ICTQT, room 319
Passcode: 3SM3fW
Speaker: Dominik Šafránek (Institute for Basic Science, South Korea) Abstract I will introduce a protocol which allows to unitarily extract work out of sources of quantum states characterized only by a single type of coarse measurement. This defines a new notion of extractable work, which we call observational ergotropy, because it is directly related to […]

A Pub-chat or How we could stop worrying and love Quantum

Date: Wednesday, April 12, 2023
Time: 16:00
Host: ICTQT Quantum Foundations
Speaker: Some Bhattacharya (ICTQT) Abstract Composing elementary physical systems is one of the most sober and important affairs in the foundations of science, art and every other meaningful endeavours of life. Of course quantum formalism provides us with a recipe for composing multipartite systems. But we would like to explore the ‘what if’ proposals (however […]

A tale of unexpected consequences: From foundational problems to mathematical results and applications in quantum information

Date: Wednesday, April 12, 2023
Time: 14:30
Host: Quantum Information and Quantum Computing Working Group, Meeting ID: 844 2780 6931
Passcode: nisq
Speaker: Martin Plávala (Universität Siegen) Abstract This talk begins with the problem whether entanglement exists in all non-classical operational theories. This problem was already considered as a mathematical problem by George Barker in the 70' in the context of ordered vector spaces; here we discuss some aspects of the proof that entanglement is a generic […]

Generation, storage, and validation of metrologically useful many-body entangled states in the analog and digital quantum simulators in the NISQ era

Date: Wednesday, April 12, 2023
Time: 12:30
Host: CENTER FOR THEORETICAL PHYSICS COLLOQUIUM
Passcode: 134595
Speaker: Dr Marcin Płodzień (ICFO - The Institute of Photonic Sciences) Abstract Because of challenges in fault-tolerant quantum computing, the main goal for quantum technologies in the next decade is to generate, characterize, and validate massively correlated quantum states. Non-classical correlations, namely entanglement and Bell correlations, are fundamental properties of the quantum many-body systems and […]

Operational quantum frames

Date: Wednesday, April 5, 2023
Time: 12:30
Host: CENTER FOR THEORETICAL PHYSICS COLLOQUIUM
Passcode: 134595
Speaker: Jan Głowacki (Center for Theoretical Physics, PAS) Abstract I will advertise a way to think about intersecting principles of relativity with the operational approach to quantum physics building on the ideas of the quantum reference frames program. After briefly explaining the need for alternatives/extensions/clarifications of the QFT formalism, I will start with a conceptual […]

Contextuality in composite systems: the role of entanglement in the Kochen-Specker theorem

Date: Wednesday, April 5, 2023
Time: 14:30
Host: Quantum Information and Quantum Computing Working Group, Meeting ID: 844 2780 6931
Passcode: nisq
Speaker: Ravi Kunjwal (Centre for Quantum Information and Communication (QuIC) of the Université libre de Bruxelles (ULB), Brussels, Belgium) Abstract The fact that quantum theory radically departs from 'classical lines of thought' is a critical driver for its applications in quantum information and computation. A famous example of this radical departure---this nonclassicality---is entanglement. Bell's theorem […]

Dynamical monitoring in higher dimensions and the emergence of physical realism

Date: Wednesday, March 29, 2023
Time: 14:30
Host: CENTER FOR THEORETICAL PHYSICS COLLOQUIUM
Passcode: 134595
Speaker: Alexandre Orthey (CTP PAS) Abstract To better understand the emergence of physical reality in quantum systems during the measurement procedure, we need a model that can interpolate between weak measurements and strong (projective) measurements in systems of any dimension. Although the quantum logic gates to perform that on qubits are known [e.g., A. Touil […]

Nonclassical correlations and Quantum Theory

Date: Wednesday, March 22, 2023
Time: 12:30
Host: CENTER FOR THEORETICAL PHYSICS COLLOQUIUM
Passcode: 134595
Speaker: Rafael Freitas dos Santos (Center for Theoretical Physics PAS) Abstract In this talk, I'll present a concept of nonclassicality exploring properties of contextuality and nonlocality. Quantum contextuality is one of the most intriguing properties of quantum theory and provides a notion of nonclassicality, while nonlocality is a special case of contextuality when the physical […]