PhilSci Archive

Empirical Underdetermination for Physical Theories in C* Algebraic Setting: Comments to an Arageorgis's Argument

Stergiou, Chrysovalantis (2020) Empirical Underdetermination for Physical Theories in C* Algebraic Setting: Comments to an Arageorgis's Argument. [Preprint]

[img]
Preview
Text
Comment Arage .pdf

Download (289kB) | Preview

Abstract

In this paper, I reconstruct an argument of Aristidis Arageorgis against empirical underdetermination of the state of a physical system in a C*-algebraic setting and explore its soundness. The argument, aiming against algebraic imperialism, the operationalist attitude which characterized the first steps of Algebraic Quantum Field Theory, is based on two topological properties of the state space: being T1 and being first countable in the weak*-topology. The first property is possessed trivially by the state space while the latter is highly non-trivial, and it can be derived from the assumption of the algebra of observables’ separability. I present some cases of classical and of quantum systems which satisfy the separability condition, and others which do not, and relate these facts to the dimension of the algebra and to whether it is a von Neumann algebra. Namely, I show that while in the case of finite-dimensional algebras of observables the argument is conclusive, in the case of infinite-dimensional von Neumann algebras it is not. In addition, there are cases of infinite-dimensional quasilocal algebras in which the argument is conclusive. Finally, I discuss Porrmann's construction of a net of local separable algebras in Minkowski spacetime which satisfies the basic postulates of Algebraic Quantum Field Theory.


Export/Citation: EndNote | BibTeX | Dublin Core | ASCII/Text Citation (Chicago) | HTML Citation | OpenURL
Social Networking:
Share |

Item Type: Preprint
Creators:
CreatorsEmailORCID
Stergiou, Chrysovalantisvalstergiou@gmail.com
Keywords: Empirical Underdetermination, Algebraic Formulation of Physical Theories, State Space, First Countable, Separability.
Subjects: Specific Sciences > Physics
Specific Sciences > Physics > Quantum Field Theory
General Issues > Realism/Anti-realism
Depositing User: Chrysovalantis Stergiou
Date Deposited: 07 Jul 2020 02:16
Last Modified: 07 Jul 2020 02:16
Item ID: 17439
Subjects: Specific Sciences > Physics
Specific Sciences > Physics > Quantum Field Theory
General Issues > Realism/Anti-realism
Date: 6 July 2020
URI: https://philsci-archive-dev.library.pitt.edu/id/eprint/17439

Monthly Views for the past 3 years

Monthly Downloads for the past 3 years

Plum Analytics

Actions (login required)

View Item View Item