10 citations · 18 across the 10 of their papers we have counts for
11 papers
Foundational puzzles on quantum universality: From Wigner's friend to black holes
Laurens Walleghem
Despite its remarkable empirical success and predictive power, quantum theory is riddled with mysteries. One such conceptual puzzle is the measurement problem: why do quantum syste…
Questioning the absoluteness of free choices when internalized in Wigner's friend scenarios
Laurens Walleghem
Wigner's thought experiment illustrates quantum theory's measurement problem by considering an observer who measures a quantum system inside a sealed lab, modeled unitarily by an o…
Particle detector in a position-superposed black hole spacetime
Laurens Walleghem, Carlo Cepollaro
We calculate the response of an Unruh--DeWitt detector in a 2+1d spacetime that contains a BTZ black hole in a superposition of locations as viewed in a reference system associated…
Wigner's friend's black hole adventure: an argument for complementarity?
Laurens Walleghem
At the heart of both black hole physics and Wigner's friend scenarios lies the question of unitarity. In Wigner's friend setups, sealed-lab measurements are modeled unitarily, prob…
An extended Wigner's friend no-go theorem inspired by generalized contextuality
Laurens Walleghem, Lorenzo Catani
The renowned Local Friendliness no-go theorem demonstrates the incompatibility of quantum theory with the combined assumptions of Absoluteness of Observed Events - the idea that ob…
Connecting extended Wigner's friend arguments and noncontextuality
Laurens Walleghem, Yìlè Yīng, Rafael Wagner +1
The Local Friendliness argument is an extended Wigner's friend no-go theorem that provides strong constraints on the nature of reality -- stronger even than those imposed by Bell's…
A refined Frauchiger--Renner paradox based on strong contextuality
Laurens Walleghem, Rui Soares Barbosa, Matthew F. Pusey +1
The Frauchiger--Renner paradox derives an inconsistency when quantum theory is used to describe the use of itself, by means of a scenario where agents model other agents quantumly…
Stunned by Sleeping Beauty: How Prince Probability updates his forecast upon their fateful encounter
Laurens Walleghem
The Sleeping Beauty problem is a puzzle in probability theory that has gained much attention since Elga's discussion of it [Elga, Adam, Analysis 60 (2), p.143-147 (2000)]. Sleeping…
Comment on a no-go theorem for -ontic models
Laurens Walleghem, Shashaank Khanna, Rutvij Bhavsar
In a recent paper [Carcassi, Oldofredi and Aidala, Found Phys 54, 14 (2024)] it is claimed that the whole Harrigan--Spekkens framework of ontological models is inconsistent with qu…
Extended Wigner's friend paradoxes do not require nonlocal correlations
Laurens Walleghem, Rafael Wagner, Yìlè Yīng +1
Extended Wigner's friend no-go theorems provide a modern lens for investigating the measurement problem, by making precise the challenges that arise when one attempts to model agen…
Wald's entropy in Coincident General Relativity
Lavinia Heisenberg, Simon Kuhn, Laurens Walleghem
The equivalence principle and its universality enables the geometrical formulation of gravity. In the standard formulation of General Relativity á la Einstein, the gravitational in…