Format results
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The Shadow of Real Quantum Theory
Alexander Wilce - Susquehanna University
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Privacy-preserving machine learning with tensor networks
Alejandro Pozas Kerstjens - University of Geneva (UNIGE)
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Von Neumann‐Morgenstern and Savage Theorems for Causal Decision Making
Mauricio Soto - University of Vienna
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Relating Wigner's Friend Scenarios to Nonclassical Causal Compatibility, Monogamy Relations, and Fine Tuning
Yìlè Yīng - Perimeter Institute for Theoretical Physics
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Principle of Information Causality Rationalizes Quantum Composition
Mir Alimuddin - S.N. Bose National Centre for Basic Sciences
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Indefinite temporal order on a superposition of spherical shells - VIRTUAL
Natália Salomé Móller - Slovak Academy of Sciences
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Witnesses of non-classicality beyond quantum theory - VIRTUAL
Chiara Marletto - University of Oxford
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Causality and positivity in causally complex operational probabilistic theories
Lucien Hardy - Perimeter Institute for Theoretical Physics
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Quantum Prison Break and the Infinitesimal Limit of Quantum Teleportation
Barbara Soda - Perimeter Institute for Theoretical Physics
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A theory of Inaccessible Information
Jacopo Surace - Aix-Marseille University
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The Shadow of Real Quantum Theory
Alexander Wilce - Susquehanna University
Local tomography (or tomographic locality) is the principle that the state of a composite systems is determined by the probabilities it assigns to outcomes of experiments performed separately on the component systems. It's well known that complex quantum theory enjoys, and real quantum theory lacks… -
Privacy-preserving machine learning with tensor networks
Alejandro Pozas Kerstjens - University of Geneva (UNIGE)
In this talk, I will argue and practically illustrate that insights in quantum information, concretely coming from the tensor network representations of quantum many-body states, can help in devising better privacy-preserving machine learning algorithms. In the first part, I will show that standard… -
Von Neumann‐Morgenstern and Savage Theorems for Causal Decision Making
Mauricio Soto - University of Vienna
Decision-making under uncertainty and causal thinking are fundamental aspects of intelligent reasoning. Decision-making has been well studied when the available information is considered at the associative (probabilistic) level. The classical Theorems of von Neumann-Morgenstern and Savage provide a… -
Relating Wigner's Friend Scenarios to Nonclassical Causal Compatibility, Monogamy Relations, and Fine Tuning
Yìlè Yīng - Perimeter Institute for Theoretical Physics
Nonclassical causal modeling was developed in order to explain violations of Bell inequalities while adhering to relativistic causal structure and faithfulness -- that is, avoiding fine-tuned causal explanations. Recently, a no-go theorem stronger than Bell's theorem has been derived, based on… -
Principle of Information Causality Rationalizes Quantum Composition
Mir Alimuddin - S.N. Bose National Centre for Basic Sciences
The principle of information causality, proposed as a generalization of no signaling principle, has efficiently been applied to outcast beyond quantum correlations as unphysical. In this talk, we show that this principle, when utilized properly, can provide physical rationale toward structural… -
Indefinite temporal order on a superposition of spherical shells - VIRTUAL
Natália Salomé Móller - Slovak Academy of Sciences
The field of indefinite order in quantum theory was born from an attempt to construct a theory of quantum gravity, where the first step is to construct a generalized quantum theory in which events could have an indefinite order [1]. It is expected that such a theory would lead us more naturally to… -
Witnesses of non-classicality beyond quantum theory - VIRTUAL
Chiara Marletto - University of Oxford
The theory of quantum computation has brought us rapid technological developments, together with remarkable improvements in how we understand quantum theory. In this talk, I shall describe the foundations of a theoretical programme to extend the quantum theory of computation beyond quantum theory… -
Network nonlocality and large linear programs
Victor Gitton - ETH Zurich
Network nonlocality, and more specifically, triangle network nonlocality, is a basic feature of modern causal modelling when going beyond Bell scenarios. However, despite the apparent simplicity of the problems one may formulate, relatively little is known due to the hardness of certifying… -
Causality and positivity in causally complex operational probabilistic theories
Lucien Hardy - Perimeter Institute for Theoretical Physics
In the usual operational picture, operations are represented by boxes having inputs and outputs. Further, we usually consider the causally simple case where the inputs are prior to the outputs for each such operation. In this talk (motivated by an attempt to formulate an operational probabilistic… -
Quantum Prison Break and the Infinitesimal Limit of Quantum Teleportation
Barbara Soda - Perimeter Institute for Theoretical Physics
We will present a teleportation protocol which uses the properties of superoscillatory wavefunctions. Then we will briefly introduce a different protocol, the port based teleportation. We will use it to study teleportation over infinitesimally small distances, where the vacuum of a quantum field… -
A theory of Inaccessible Information
Jacopo Surace - Aix-Marseille University
Out of the many lessons quantum mechanics seems to teach us, one is that it seems there are things we cannot experimentally have access to. There is, indeed, a fundamental limit to our ability to experimentally explore the world. In this work we accept this lesson as a fact and we build a general… -
Universal, deterministic, and exact protocol to reverse qubit-unitary and qubit-encoding isometry operations
Satoshi Yoshida - University of Tokyo
We report a deterministic and exact protocol to reverse any unknown qubit-unitary and qubit-encoding isometry operations. To avoid known no-go results on universal deterministic exact unitary inversion, we consider the most general class of protocols transforming unknown unitary operations within…