Generalized probability theories: what determines the structure of quantum theory?

P Janotta, H Hinrichsen - Journal of Physics A: Mathematical and …, 2014‏ - iopscience.iop.org
The framework of generalized probabilistic theories is a powerful tool for studying the
foundations of quantum physics. It provides the basis for a variety of recent findings that …

[HTML][HTML] A change of perspective: switching quantum reference frames via a perspective-neutral framework

A Vanrietvelde, PA Hoehn, F Giacomini… - Quantum, 2020‏ - quantum-journal.org
Treating reference frames fundamentally as quantum systems is inevitable in quantum
gravity and also in quantum foundations once considering laboratories as physical systems …

On the quantum measurement problem

Č Brukner - Quantum [un] speakables II: half a century of Bell's …, 2017‏ - Springer
In this paper, I attempt a personal account of my understanding of the measurement problem
in quantum mechanics, which has been largely in the tradition of the Copenhagen …

Higher-order interference and single-system postulates characterizing quantum theory

H Barnum, MP Müller, C Ududec - New Journal of Physics, 2014‏ - iopscience.iop.org
We present a new characterization of quantum theory in terms of simple physical principles
that is different from previous ones in two important respects: first, it only refers to properties …

Quantum theory from questions

PA Höhn, CSP Wever - Physical Review A, 2017‏ - APS
We reconstruct the explicit formalism of qubit quantum theory from elementary rules on an
observer's information acquisition. Our approach is purely operational: we consider an …

Dynamics of quantum causal structures

E Castro-Ruiz, F Giacomini, Č Brukner - Physical Review X, 2018‏ - APS
It was recently suggested that causal structures are both dynamical, because of general
relativity, and indefinite, because of quantum theory. The process matrix formalism furnishes …

Existence of an information unit as a postulate of quantum theory

L Masanes, MP Müller, R Augusiak… - Proceedings of the …, 2013‏ - pnas.org
Does information play a significant role in the foundations of physics? Information is the
abstraction that allows us to refer to the states of systems when we choose to ignore the …

Generalized probabilistic theories without the no-restriction hypothesis

P Janotta, R Lal - Physical Review A—Atomic, Molecular, and Optical …, 2013‏ - APS
The framework of generalized probabilistic theories is a popular approach for studying the
physical foundations of quantum theory. The standard framework assumes the no-restriction …

Memory cost of quantum contextuality

M Kleinmann, O Guehne, JR Portillo… - New Journal of …, 2011‏ - iopscience.iop.org
The simulation of quantum effects requires certain classical resources, and quantifying them
is an important step to characterize the difference between quantum and classical physics …

[HTML][HTML] Toolbox for reconstructing quantum theory from rules on information acquisition

PA Höhn - Quantum, 2017‏ - quantum-journal.org
We develop an operational approach for reconstructing the quantum theory of qubit systems
from elementary rules on information acquisition. The focus lies on an observer $ O …