Entangled photon sources are desirable and key elements for photonic quantum information
processing. The spontaneous parametric down‐conversion (SPDC) process is a convenient …

The Theoretical Framework in Phenomenological Research: Development and Application
is an introduction to phenomenology in which the authors overview its origin, main ideas …

Wigner’s friend and relational objectivity | Nature Reviews Physics Skip to main content Thank
you for visiting nature.com. You are using a browser version with limited support for CSS. To …

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 …

The relational interpretation (or RQM, for Relational Quantum Mechanics) solves the
measurement problem by considering an ontology of sparse relative events, or" facts". Facts …

A recent paper by two of us and co-workers [1], based on an extended Wigner's friend
scenario, demonstrated that certain empirical correlations predicted by quantum theory (QT) …

According to QBism, quantum states, unitary evolutions, and measurement operators are all
understood as personal judgments of the agent using the formalism. Meanwhile, quantum …

We summarise different aspects of the measurement problem in quantum mechanics. We
argue that it is a real problem which requires a solution, and identify the properties a theory …

Relational quantum mechanics (RQM) proposes an ontology of relations between physical
systems, where any system can serve as an 'observer'and any physical interaction between …

From its seemingly non-intuitive and puzzling nature, most evident in numerous EPR-like
gedanken experiments to its almost ubiquitous presence in quantum technologies …