3 papers
quant-ph2026
The Paradox of the Third Particle is classical
Ladina Hausmann, Renato Renner
The Paradox of the Third Particle arises when particles are described relative to one of them serving as a reference frame. Although it is typically attributed to quantum superposi…
quant-ph2026
Against probability: A quantum state is more than a list of probability distributions
Ladina Hausmann, Renato Renner
The state of a quantum system can be represented by listing the outcome probabilities for a tomographically complete set of measurements. Such representations appear throughout phy…
quant-ph2025
The firewall paradox is Wigner's friend paradox
Ladina Hausmann, Renato Renner
The firewall paradox, a puzzle in black hole physics, depends on an implicit assumption: a rule that allows the infalling and the outside observer to combine their perspectives. Ho…