Format results
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Measurement incompatibility implies irreversible disturbance
Davide Rolino - University of Pavia
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Partitions in quantum theory
Augustin Vanrietvelde - Télécom Paris
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From nonlocality transitivity to resource marginal problems and back
Yeong-Cherng Liang - National Cheng Kung University
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Quantum Foundations SeminarBayesian learning of Causal Structure and Mechanisms with GFlowNets and Variational Bayes
Mizu Nishikawa-Toomey - Mila - Quebec Artificial Intelligence Institute
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s-ordered phase-space correspondences, fermions, and negativities
Ninnat Dangniam - Naresuan University
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Nonclassicality in correlations without causal order
Ravi Kunjwal - Aix-Marseille University
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Energy and speed bound in GPTs - VIRTUAL
Lorenzo Giannelli - University of Hong Kong (HKU)
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Information dynamics or dynamics from information
Matteo Scandi - Institute for Cross-Disciplinary Physics and Complex Systems (IFISC)
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Higher-Order Blind Quantum Computation
Thomas Vinet - Télécom Paris
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Superdeterminism – The Forgotten Solution
Sabine Hossenfelder - Ludwig-Maximilians-Universität München (LMU)
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Is the no-cloning theorem truly quantum? Topological Obstructions to Cloning in Classical Mechanics
Yuan Yao
the no-cloning theorem is an essential result in quantum information on top of which many quantum cryptography protocols are built. In this talk we examine the cloning question in the context of classical mechanics/Hamiltonian mechanics. We find the answer is quite subtle: whether a mechanical… -
Measurement incompatibility implies irreversible disturbance
Davide Rolino - University of Pavia
To justify the existence of measurements that can not be performed jointly on quantum systems, Heisenberg put forward a heuristic argument, involving the famous gamma-ray microscope Gedankenexperiment, based on the existence of measurements that irreversibly alter the physical system on which they… -
Partitions in quantum theory
Augustin Vanrietvelde - Télécom Paris
The standard perspective on subsystems in quantum theory is a bottom-up, compositional one: one starts with individual "small" systems, viewed as primary, and composes them together to form larger systems. The top-down, decompositional perspective goes the other way, starting with a "large" system… -
From nonlocality transitivity to resource marginal problems and back
Yeong-Cherng Liang - National Cheng Kung University
In this talk, I shall recall the nonlocality transitivity problem, which concerns the possibility of inferring the Bell-nonlocality of certain marginals in a multipartite scenario based on other given marginals. Then, I explain how considering this problem has led to a more general class of problems… -
Quantum spatiotemporal correlations and Bayes' rule
While quantum correlations between two spacelike-separated systems are fully encoded by the bipartite density operator associated with the joint system, what operator encodes quantum correlations across space and time? I will describe the general theory of such "quantum states over time" as well as… -
Quantum Foundations SeminarBayesian learning of Causal Structure and Mechanisms with GFlowNets and Variational Bayes
Mizu Nishikawa-Toomey - Mila - Quebec Artificial Intelligence Institute
Bayesian causal structure learning aims to learn a posterior distribution over directed acyclic graphs (DAGs), and the mechanisms that define the relationship between parent and child variables. By taking a Bayesian approach, it is possible to reason about the uncertainty of the causal model. The… -
s-ordered phase-space correspondences, fermions, and negativities
Ninnat Dangniam - Naresuan University
For continuous-variable systems, the negativities in the s-parametrized family of quasi-probability representations on a classical phase space establish a sort of hierarchy of non-classility measures. The coherent states, by design, display no negativity for any value of -1≤s≤1, meaning that… -
Nonclassicality in correlations without causal order
Ravi Kunjwal - Aix-Marseille University
A Bell scenario can be conceptualized as a "communication" scenario with zero rounds of communication between parties, i.e., although each party can receive a system from its environment on which it can implement a measurement, it cannot send out any system to another party. Under this constraint… -
Energy and speed bound in GPTs - VIRTUAL
Lorenzo Giannelli - University of Hong Kong (HKU)
Information-theoretic insights have proven fruitful in many areas of quantum physics. But can the fundamental dynamics of quantum systems be derived from purely information-theoretic principles, without resorting to Hilbert space structures such as unitary evolution and self-adjoint observables… -
Information dynamics or dynamics from information
Matteo Scandi - Institute for Cross-Disciplinary Physics and Complex Systems (IFISC)
In this talk the role of information theory in the description of physical evolutions will be discussed. After defining information quantifiers, their contractivity with respect to physical dynamics will be explained, a requirement which simply encodes the intuition that noisy transformations should… -
Higher-Order Blind Quantum Computation
Thomas Vinet - Télécom Paris
In the near future, where only a small number of companies and institutions will have access to large-scale quantum computers, it is essential that clients are able to delegate their computations in a secure way, without their data being accessible by the server. The field of blind quantum… -
Superdeterminism – The Forgotten Solution
Sabine Hossenfelder - Ludwig-Maximilians-Universität München (LMU)
What is a measurement? This, it turns out, is the most difficult question in physics today. In this talk, I will explain why the measurement problem is important and why all attempts to solve it so far have failed. I will then discuss the obvious solution to the problem that was, unfortunately…