Chairs
Dr Valentina Parigi, Laboratoire Kastler Brossel, Pierre and Marie Curie University
Dr Valentina Parigi, Laboratoire Kastler Brossel, Pierre and Marie Curie University
Valentina Parigi obtained her PhD at LENS (European Laboratory for Non-Linear Spectroscopy) in Florence in 2009. During her PhD she worked on generation, manipulation and characterization of non-classical states of light and she realized the first experimental test on quantum commutation rules. As a post-doc she has been involved in the experimental realization of strong non-linear effects mediated by Rydberg atoms, at the Institut d’Optique in Palaiseau and she worked in the atomic quantum memory group at Laboratoire Kastler Brossel (LKB) in Paris. She joined in 2015 the Multimode Quantum Optics team at LKB as Associate Professor. She is currently involved in the implementation of complex quantum networks in a multi-mode continuous-variables scenario.
Her interests range from the foundations of quantum mechanics to the experimental implementation of basic tools for quantum information technologies.
09:00-09:05
Welcome by the Royal Society and Gerardo Adesso
Professor Gerardo Adesso, University of Nottingham
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Professor Gerardo Adesso, University of Nottingham
Professor Gerardo Adesso, University of Nottingham
Gerardo Adesso is fascinated by the elusive border between quantum and classical descriptions of the world. He got his PhD in Physics at University of Salerno (Italy) in 2007, working on characterisation and applications of entanglement in continuous variable quantum systems. After a post-doctoral experience at Universitat Autonoma de Barcelona (Spain), he joined University of Nottingham as a Lecturer in 2009. His recent research has been pioneering in unveiling resources for quantum technology that are more general and robust than entanglement, challenging the two-decade-old separability paradigm. Gerardo is now a Professor of Mathematical Physics at Nottingham and leads a research team working on all aspects of quantum correlations and coherence (http://quantumcorrelations.weebly.com), supported by an ERC Starting Grant and further awards from Royal Society and Foundational Questions Institute. His current interests extend to more applied subjects ranging from quantum information & communication technologies to sensing & metrology, thermodynamics, and beyond.
09:05-09:35
Recovering the quantum formalism from physically realist axioms
Professor Philippe Grangier, Insitute d'Optique Palaiseau
Abstract
We present a heuristic derivation of Born's rule and unitary transforms in Quantum Mechanics, from a simple set of axioms built upon a physical phenomenology of quantisation. This approach naturally leads to the usual quantum formalism, within a new realistic conceptual framework that is discussed in details. Physically, the structure of Quantum Mechanics appears as a result of the interplay between the quantised number of "modalities" accessible to a quantum system, and the continuum of "contexts" that are required to define these modalities. Mathematically, the Hilbert space structure appears as a consequence of a specific "extra-contextuality" of modalities, closely related to the hypothesis of Gleason's theorem, and consistent with its conclusions.
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Professor Philippe Grangier, Insitute d'Optique Palaiseau
Professor Philippe Grangier, Insitute d'Optique Palaiseau
Philippe Grangier is head of the Quantum Optics group at Institut d'Optique in Palaiseau, France, and Professor at Ecole Polytechnique. He started his research activity in 1980, on experimental tests of Bell’s inequalities, with Alain Aspect as advisor. Then he worked on single-photon interferences (PhD thesis), and interferometry using squeezed light (postdoc in Bell Labs, 1987). After creating his own group, he realised a series of quantum optics experiment during the 1990’s, including optical QND measurements. Then from 2000 he performed many experiments related to Quantum Information Processing: single atom qubits in microscopic optical tweezers, quantum cryptography using single photons or continuous variables, entanglement control in atomic and photonic quantum states. He authored more than 200 publications, and his achievements have been recognised by many national and international awards, including an Advanced Grant from the European Research Council (ERC).
09:50-10:20
Relational quantum mechanics: understanding with 'relations' versus understanding with 'things'
Professor Carlo Rovelli, Aix-Marseille University
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Professor Carlo Rovelli, Aix-Marseille University
Professor Carlo Rovelli, Aix-Marseille University
Carlo Rovelli is a theoretical physicist. He was born in Verona, Italy, has worked in several university in Italy; the US and France and is currently directing the quantum gravity group of the Centre de Physique Theorique de Luminy in Marseille. He is member of the Institut Universitaire de France and the International Academy for the Philosophy of Science. Among his honors are the Xanthopoulos Prize, the honorary Professorship at the Normal University of Beijing and and the Laurea Honoris Causa of the University of Saint Martin in Buenos Aires. His main contributions are in Loop Quantum Gravity, on the foundations of Quantum Mechanics and on the study of Time. He has also published for the large public: his book Seven Brief Lesson on Physics, in particular, has been translated in more than 40 languages.
11:05-11:35
Quantum automata field theory: derivation of mechanics from algorithmic principles
Professor Giacomo Mauro D'Ariano, University of Pavia
Abstract
This talk will briefly review a recent derivation of quantum theory and free quantum field theory from purely information-theoretical principles, leading to an extended theory made with quantum walks. We will focus on the causality principle for quantum theory, and show that its notion coincides with the usual Einstein’s one in special relativity. It will then see how Lorentz transformations are derived from just our informational principles, without using space-time, kinematics, and mechanics. The Galileo relativity principle is translated to the case of general dynamical systems. The resulting invariance group is a nonlinear version of the Lorentz group (the automata theory is thus a model for the so-called "doubly special relativity"), and the usual linear group is recovered in the small wavevector regime, corresponding to the physical domain experimented so far. The notion of particle is still that of Poincaré invariant. New interesting emerging features arise that have a General-Relativity flavour.
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Professor Giacomo Mauro D'Ariano, University of Pavia
Professor Giacomo Mauro D'Ariano, University of Pavia
Giacomo Mauro D’Ariano is full professor of Theoretical Physics at Pavia University, and leader of the Quantum Information Theory Group “QUit”. He teaches Quantum Mechanics and Foundations of Quantum Theory. He is Fellow of the American Physical Society and of the Optical Society of America, member of the Academy Istituto Lombardo of Scienze e Lettere, of the Center for Photonic Communication and Computing at Northwestern IL, and of the Foundational Questions Institute (FQXi).
Mauro pioneered quantum information in Italy and later, with his disciples Chiribella and Perinotti, he derived Quantum Theory from information-theoretic principles, the topic of a book published by Cambridge. More recently he has opened the way to extend the informational paradigm to the derivation of Quantum Field Theory. Mauro is also actively interacting with philosophers, aimed at creating a "Milano circle" on philosophy of science, with strong focus on scientific method and the issue of realism.
11:50-12:20
Complementarity and uncertainty: what remains?
Professor Reinhard F Werner, Leibniz University of Hannover
Abstract
Complementarity and uncertainty were two ideas in the early development of quantum mechanics. Famously, Bohr and Heisenberg introduced them separately, after they took a break from a series of intense discussions in Copenhagen in 1927. They both worked at a rather heuristic level, and public presentations of their ideas still tend to reflect this early style and the sense of paradox, which the original authors cherished so much.
On the other hand, also in 1927, the theory took mathematical shape at the hands of von Neumann, which made wave particle dualism obsolete, and opened up the possibility of turning the heuristic ideas of Heisenberg and Bohr into general, quantitative and falsifiable statements. For uncertainty this process also began in 1927, when Kennard and Weyl fulfilled Heisenberg's promise that the uncertainty relations could be proved from the basic assumptions of the theory. The disturbance-accuracy tradeoff took much longer, but is today also firmly established.
The role of complementarity changed in a general process of sharpening of interpretation. Today the operational content of quantum mechanics and its statistical framework is very clear. It can be applied and taught with confidence without taking recourse to Bohr's elaborate complementary doublethink. Yet the old idea still has an important if somewhat demystified place. In the talk this place will be pointed out and some continuity with origins established.
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Professor Reinhard F Werner, Leibniz University of Hannover
Professor Reinhard F Werner, Leibniz University of Hannover
Reinhard F Werner is currently Physics professor at the Institute for Theoretical Physics, Leibniz University Hannover. He is interested in the conceptual and mathematical foundations of quantum theory. Anything, in which the structure of quantum mechanics plays a non-trivial role. In recent years, he has mostly applied his interests in quantum information theory, but also quantum statistical mechanics and the theory of time in quantum mechanics. As a mathematical physicist, he also tries to answer questions regarding generally observed features of the theory, like for instance the approach of equilibrium in macroscopic systems, at their appropriate level of generality. He is the recipient of the International Quantum Communication Award, for for his foundational contributions to the field of quantum information: especially quantum entanglement and nonlocality, quantum Shannon theory, quantum memory channels, and quantum cellular automata.