arXiv subjects

Calum J. Robson

Publications and source records attributed to Calum J. Robson.

2 recordsLinked to original sources

arXiv2023

Relational Quantum Mechanics and Contextuality

This paper discusses the question of Stable Facts in Relational Quantum Mechanics. I examine how the approach to quantum logic in the consistent histories formalism can be used to clarify what information about a system can be shared between different observers.I suggest that the mathematical framework for Consistent Histories can and should be incorporated into RQM, whilst being clear on the interpretational differences between the two approaches. Finally I briefly discuss two related issues: the similarities and differences between special relativity and RQM and the recent Cross- Perspectival Links modification to RQM.

quant-ph↗

arXiv2022

Notes on the Dynamics of Noncommutative U(2) and Commutative SU(3) Instantons

We examine the dynamics of noncommutative instantons of instanton number $2$ and commutative instantons of instanton number $3$ in 5d Super Yang Mills theory. We begin by detailing the construction of the 1/4-BPS instanton solutions, their moduli space, and the moduli space potential using an explicit parametrisation of the moduli space coordinates in terms of the biquaternions. We then go on to numerically analyse the dynamics on the moduli spaces we have constructed, discussing some of the numerical issues which arose and describing the code we developed to solve them

hep-th↗