Supersymmetric minisuperspace models in self-dual loop quantum cosmology

TL;DR

This paper develops a supersymmetric loop quantum cosmology model using self-dual variables, demonstrating the closure of the constraint algebra and reproducing classical relations at the quantum level.

Contribution

It introduces a novel supersymmetric minisuperspace model in loop quantum cosmology with self-dual variables, showing algebra closure and quantum-classical correspondence.

Findings

Constraint algebra closes in the classical theory.

Quantum commutators reproduce classical Poisson relations.

The model's dynamics align with standard minisuperspace quantization.

Abstract

In this paper, we study a class of symmetry reduced models of $\mathcal{N}=1$ supergravity using self-dual variables. It is based on a particular Ansatz for the gravitino field as proposed by D'Eath et al. We show that the essential part of the constraint algebra in the classical theory closes. In particular, the (graded) Poisson bracket between the left and right supersymmetry constraint reproduces the Hamiltonian constraint. For the quantum theory, we apply techniques from the manifestly supersymmetric approach to loop quantum supergravity, which yields a graded analog of the holonomy-flux algebra and a natural state space. We implement the remaining constraints in the quantum theory. For a certain subclass of these models, we show explicitly that the (graded) commutator of the supersymmetry constraints exactly reproduces the classical Poisson relations. In particular, the trace of the commutator of left and right supersymmetry constraints reproduces the Hamilton constraint operator. Finally, we consider the dynamics of the theory and compare it to a quantization using standard variables and standard minisuperspace techniques.