On Supergroups with Odd Clifford Parameters and Supersymmetry with Modified Leibniz Rule

TL;DR

This paper explores supergroups with odd Clifford parameters, introduces a Berezin-like calculus, and examines deformations in supersymmetric theories, including applications to quantum mechanics and connections to non-anticommutative supersymmetry.

Contribution

It develops a framework for supergroups with odd Clifford variables, deriving covariant derivatives and analyzing deformations in supersymmetric models, including a novel example with a pseudo-hermitian Hamiltonian.

Findings

Deformation of supersymmetric theories when graded Leibniz rule is violated.

Introduction of a Berezin-like calculus for odd Clifford variables.

Identification of pseudo-hermitian Hamiltonians in deformed supersymmetric models.

Abstract

We investigate supergroups with Grassmann parameters replaced by odd Clifford parameters. The connection with non-anticommutative supersymmetry is discussed. A Berezin-like calculus for odd Clifford variables is introduced. Fermionic covariant derivatives for supergroups with odd Clifford variables are derived. Applications to supersymmetric quantum mechanics are made. Deformations of the original supersymmetric theories are encountered when the fermionic covariant derivatives do not obey the graded Leibniz property. The simplest non-trivial example is given by the N=2 SQM with a real $(1,2,1)$ multiplet and a cubic potential. The action is real. Depending on the overall sign ("Euclidean" or "Lorentzian") of the deformation, a Bender-Boettcher pseudo-hermitian hamiltonian is encountered when solving the equation of motion of the auxiliary field. A possible connection of our framework with the Drinfeld twist deformation of supersymmetry is pointed out.