5 papers
Causality from the spectrum: Emergence of causal order from process-matrix mereology
Varun Kushwaha, Nicolas Loizeau, Alexei Grinbaum +1
In Hamiltonian systems, the only basis-independent quantity is the spectrum. Given a spectrum, quantum mereology seeks preferred tensor-product decompositions into local subsystems…
Frame perspectives for process matrices: from coordinate parametrization to spacetime representation
Luca Apadula, Alexei Grinbaum, Äaslav Brukner
We study how to implement and transform frame perspectives for quantum processes in the process-matrix formalism. We argue that, for pure processes, the causal reference frames (CR…
Agency under indefinite causality: operational eternalism in higher-order quantum theory
Alexei Grinbaum
After two decades of research on indefinite causality, a conceptual lesson emerges: the tension between operational quantum theory and dynamical spacetime physics requires observer…
Ethics Readiness of Artificial Intelligence: A Practical Evaluation Method
Laurynas Adomaitis, Vincent Israel-Jost, Alexei Grinbaum
We present Ethics Readiness Levels (ERLs), a four-level, iterative method to track how ethical reflection is implemented in the design of AI systems. ERLs bridge high-level ethical…
Current and Future Directions for Responsible Quantum Technologies: A ResQT Community Perspective
Adrian Schmidt, Alexandre Artaud, Arsev Umur Aydinoglu +22
Quantum technologies (QT) are advancing rapidly, promising advancements across a wide spectrum of applications but also raising significant ethical, societal, and geopolitical impa…