Does quantum theory apply at all scales, including that of observers? New light on this
fundamental question has recently been shed through a resurgence of interest in the long …

It is known that the classical framework of causal models is not general enough to allow for
causal reasoning about quantum systems. While the framework has been generalized in a …

In classical physics, the Kolmogorov extension theorem lays the foundation for the theory of
stochastic processes. It has been known for a long time that, in its original form, this theorem …

Bell inequalities rest on three fundamental assumptions: realism, locality, and free choice,
which lead to nontrivial constraints on correlations in very simple experiments. If we retain …

Quantum theory provides a framework for modern theoretical physics that enjoys enormous
predictive and explanatory success. Yet, in view of the so-called “measurement problem” …

We construct a family of quantum scalar fields over ap-adic spacetime which satisfy p-adic
analogues of the Gårding–Wightman axioms. Most of the axioms can be formulated in the …

I assess various proposals for the source of the intuition that there is something problematic
about contextuality, ultimately concluding that contextuality is best thought of in terms of fine …

The common wisdom in the field of quantum information theory is that when a system is
initially correlated with its environment, the map describing its evolution may fail to be …

Nonclassical causal modeling was developed in order to explain violations of Bell
inequalities while adhering to relativistic causal structure and $ faithfulness $---that is …

We provide a new formulation of the Local Friendliness no-go theorem of Bong et al.[Nat.
Phys. 16, 1199 (2020)] from fundamental causal principles, providing another perspective …