Zapraszamy w piątek 03.04.2020 o godz. 12:15 na seminarium.
Seminarium ONLINE pod tytułem: "TBA" poprowadzi Katzrayna Roszak, Politechnika Wrocławska
Homologie persystentne w analizie zmienności rytmu serca
Zapraszamy w czwartek 02.04.2020 o godz. 14:00 na seminarium.
Seminarium ONLINE pod tytułem: "Homologie persystentne w analizie zmienności rytmu serca" poprowadzi dr hab. Grzegorz Graff, prof. PG.
Totally destructive many-particle interference
Zapraszamy w środę 01.04.2020 o godz. 10:15 na seminarium.
Seminarium ONLINE pod tytułem: "Totally destructive many-particle interference" poprowadzi Marcin Karczewski, ICTQT UG
The Cosmological Constant Puzzle - Symmetries of Quantum Fluctuations
Zapraszamy w piątek 27.03.2020 o godz. 12:00 na seminarium.
Seminarium ONLINE pod tytułem: "The Cosmological Constant Puzzle - Symmetries of Quantum Fluctuations" poprowadzi Steven Bass, UJ
The cosmological constant in Einstein's equations of General Relativity is a prime candidate to describe the dark energy that drives the accelerating expansion of the Universe and which contributes 69% of its energy budget. The cosmological constant measures the energy density of the vacuum perceived
A primer on heat rectification
Zapraszamy w środę 18.03.2020 o godz. 10:15 na seminarium.
Seminarium ONLINE pod tytułem: "A primer on heat retification" poprowadzi Antonio Mandarino, ICTQT UG
The aim of this journal club talk will be the discussion of a topic that is getting more attention in the quantum thermodynamics community. In fact, numerous efforts, both theoretically and experimentally, are devoted to design technologies able to control and to route the heat flow in qubit systems suitable for the realization of quantum circuits.
Symmetries between measurements in quantum mechanics
Zapraszamy w środę 25.03.2020 o godz. 10:15 na seminarium.
Seminarium ONLINE pod tytułem: "Symmetries between measurements in quantum mechanics" poprowadzi Sebastien Designolle, University of Geneva
Symmetries are a key concept to connect mathematical elegance with physical insight. We consider measurement assemblages in quantum mechanics and show how their symmetry can be described by means of the so-called discrete bundles. It turns out that that many measurement assemblages used in quantum information theory as well as for studying the foundations of quantum mechanics are entirely determined by symmetry; moreover, starting from a certain symmetry group, novel types of measurement sets can be constructed. The insight gained from symmetry allows us to easily determine whether the measurements in the set are incompatible under noisy conditions, i.e., whether they can be regarded as genuinely distinct ones. In addition, symmetry allows to identify finite sets of measurements having a high sensitivity to reveal the quantumness of distributed quantum states.
Homologie persystentne w analizie zmienności rytmu serca
Zapraszamy w czwartek 12.03.2020 o godz. 12:15, sala 361 na seminarium.
Seminarium pod tytułem: "Homologie persystentne w analizie zmienności rytmu serca" poprowadzi dr hab. Grzegorz Graff, prof. PG.
Classical simulations of quantum circuits
Zapraszamy w środę 11.03.2020 o godz. 10:15, sala 361 na seminarium.
Seminarium ONLINE pod tytułem: "Classical simulations of quantum circuits" poprowadzi Kamil Korzekwa, Universytet Jagielloński
It is of foremost importance, both from the foundational and technological point of view, to understand what components of the quantum theory are responsible for quantum supremacy, i.e. the potential ability of quantum computers to solve problems that cannot be solved efficiently on classical machines. One of the most promising ways to achieve this is to identify sub-theories of the quantum theory that can be efficiently simulated on classical computers, and the corresponding quantum resources (gates or states) that are responsible for the quantum speed-up. In this talk I will present the resource-theoretic approach to quantum computation, explain how it could be employed to develop a unified scheme for classical simulation of universal quantum circuits and, finally, I will describe a particular algorithm that allows one to simulate Clifford+T circuits with state-of-the-art run-time scaling.
Classical limits and contextuality in a scenario with multiple observers
Zapraszamy w środę 04.03.2020 o godz. 10:15, sala 361 na seminarium.
Seminarium pod tytułem: "Classical limits and contextuality in a scenario with multiple observers" poprowadzi Roberto Baldijão, University of Campinas, IQOQI (Vienna)
Contextuality is regarded as a non-classical feature, challenging our everyday intuition; quantum contextuality is currently seen as a resource for many applications in quantum computation, being responsible for quantum advantage over classical analogs. In our work, we adapt the N-cycle scenarios with odd N to multiple independent observers which measure the system sequentially. We analyze the possibility of violating the inequalities as a function of the number of observers and under different measurement protocols. We then reinterpret the results as an open quantum system where the environment is divided into fractions. In this context, the results show the emergence of non-contextuality in such a setting, bringing together the quantum behavior to our classical experience. We then compare such emergence of non-contextuality with that of objectivity under the Quantum Darwinism process. We also take the opportunity to present recent developments in classical limits in Generalized Probabilistic Theories.
Applications of single photon technologies
Zapraszamy w piątek 28.02.2020 o godz. 12:15, sala 361 na seminarium.
Seminarium pod tytułem: Applications of single photon technologies"" poprowadzi Piotr Kolenderski, Single Photon Applications Laboratory
Quantum communication offers a selection of methods for absolutely secure exchange of information. There are two particular links which are used in practice: fibers and free space. The latter implemented using satellites is more challenging, but offers substantially longer ranges.During my talk I will present two projects running in our lab at Nicolaus Copernicus University, which are related to satellite based quantum communication. The first one aims in building a ground station for a satellite receiver link. The second one is a joint effort with Syderal Polska and Gdansk University, where the goal is to build a satellite-grade polarization entanglement controller.