Modular Operators and Entanglement in Supersymmetric Quantum Mechanics

TL;DR

This paper explores the application of the modular operator framework to supersymmetric quantum mechanics, revealing new insights into entanglement measures and their physical interpretations in specific models like Dirac fermions and Jaynes Cummings.

Contribution

It introduces a novel connection between the modular conjugation operator and entanglement in supersymmetric systems, providing explicit examples and physical interpretations.

Findings

Modular conjugation operator characterizes dual degeneracy in supersymmetric systems.

Entanglement of formation relates to the expectation value of the modular conjugation operator.

Application to Dirac fermions and Jaynes Cummings model demonstrates the framework's relevance.

Abstract

The modular operator approach of Tomita-Takesaki to von Neumann algebras is elucidated in the algebraic structure of certain supersymmetric quantum mechanical systems. A von Neumann algebra is constructed from the operators of the system. An explicit operator characterizing the dual infinite degeneracy structure of a supersymmetric two dimensional system is given by the modular conjugation operator. Furthermore, the entanglement of formation for these supersymmetric systems using concurrence is shown to be related to the expectation value of the modular conjugation operator in an entangled bi-partite supermultiplet state thus providing a direct physical meaning to this anti-unitary, anti-linear operator as a quantitative measure of entanglement. Finally, the theory is applied to the case of two-dimensional Dirac fermions, as is found in graphene, and a supersymmetric Jaynes Cummings Model.