Format results
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The simplicial approach to quantum contextuality
Selman Ipek - Bilkent University
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New informatic dogmas in quantum foundations
Isaac Friend - University of Oxford
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The back-reaction problem in quantum foundations and gravity
Jonathan Oppenheim - University College London
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Causality and Ideal Measurements of Smeared Fields in Quantum Field Theory
Ian Jubb - Dublin Institute For Advanced Studies
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Phenomenological thermodynamics with multiple quantities of interest
Lidia del Rio - University of Zurich
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Toys can't play: physical agents in Spekkens' theory
Lidia del Rio - University of Zurich
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Quantum nonlocality without entanglement via indefinite causal order
Ravi Kunjwal - Funds for Scientific Research - FNRS
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Quantum Reference Frames for Superpositions of Spacetimes
Anne-Catherine de la Hamette - University of Vienna
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Quantum networks self-test all entangled states
Ivan Supic - French National Centre for Scientific Research (CNRS)
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Causal Operations in Quantum Field Theory
Ian Jubb - Dublin Institute For Advanced Studies
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The simplicial approach to quantum contextuality
Selman Ipek - Bilkent University
Central to many of the paradoxes arising in quantum theory is that the act of measurement cannot be understood as merely revealing the pre-existing values of some hidden variables, a phenomenon known as contextuality. In the past few years quantum contextuality has been formalized in a variety of… -
New informatic dogmas in quantum foundations
Isaac Friend - University of Oxford
In the new wave of quantum foundations activity with its indirect approach to problems of fundamental ontology, individual explicit positions of informational immaterialism are replaced by a shared "soft informatic realism" that governs research practice, encouraging conflation of theories of… -
The back-reaction problem in quantum foundations and gravity
Jonathan Oppenheim - University College London
We consider two interacting systems when one is treated classically while the other remains quantum. Despite several famous no-go arguments, consistent dynamics of this coupling exist, and its most general form can be derived. We discuss the application of these dynamics to the foundations of… -
Causality and Ideal Measurements of Smeared Fields in Quantum Field Theory
Ian Jubb - Dublin Institute For Advanced Studies
The usual quantum mechanical description of measurements, unitary kicks, and other local operations has the potential to produce pathological causality violations in the relativistic setting of quantum field theory (QFT). While there are some operations that do not violate causality, those that do… -
On the system loophole of generalized noncontextuality
Victor Gitton - ETH Zurich
Generalized noncontextuality is a well-studied notion of classicality that is applicable to a single system, as opposed to Bell locality. It relies on representing operationally indistinguishable procedures identically in an ontological model. However, operational indistinguishability depends on the… -
Phenomenological thermodynamics with multiple quantities of interest
Lidia del Rio - University of Zurich
Joint work (in progress) with Ladina Hausmann, Nuriya Nurgalieva and Renato Renner We can classify contemporary approaches to thermodynamics in roughly four camps: (1) Top-down microscopic approaches. These are for example resource-theoretical approaches to quantum thermodynamics: they have a… -
Toys can't play: physical agents in Spekkens' theory
Lidia del Rio - University of Zurich
Information is physical, and for a physical theory to be universal, it should model observers as physical systems, with concrete memories where they store the information acquired through experiments and reasoning. Here we address these issues in Spekkens' toy theory, a non-contextual epistemically… -
Quantum nonlocality without entanglement via indefinite causal order
Ravi Kunjwal - Funds for Scientific Research - FNRS
I will discuss a recent result on an intimate link between two a priori distinct phenomena: quantum nonlocality without entanglement and classically-achievable indefinite causal order. The first phenomenon refers to a multipartite scenario where the parties are unable to perfectly discriminate… -
Atomic clock interferometers: a test for a quantum generalization of Einstein’s Equivalence Principle and a quantum sensing analysis
Carlo Cepollaro - Austrian Academy of Sciences
It is unknown how the Einstein Equivalence Principle (EEP) should be modified to account for quantum features. A possibility introduced in arXiv:2012.13754 is that the EEP holds in a generalized form for particles having an arbitrary quantum state. The core of this proposal is the ability to… -
Quantum Reference Frames for Superpositions of Spacetimes
Anne-Catherine de la Hamette - University of Vienna
The current theories of quantum physics and general relativity on their own do not allow us to study situations in which spacetime is in a quantum superposition. In this talk, I propose a general strategy to determine the dynamics of objects on an indefinite spacetime metric, using an extended… -
Quantum networks self-test all entangled states
Ivan Supic - French National Centre for Scientific Research (CNRS)
Certifying quantum properties with minimal assumptions is a fundamental problem in quantum information science. Self-testing is a method to infer the underlying physics of a quantum experiment only from the measured statistics. While all bipartite pure entangled states can be self-tested, little is… -
Causal Operations in Quantum Field Theory
Ian Jubb - Dublin Institute For Advanced Studies
While Quantum Field Theory is the most accurate theory we have for predicting the microscopic world, there are still open problems regarding its mathematical description. In particular, the usual quantum mechanical description of measurements, unitary kicks, and other local operations has the…