Two-Component Spinorial Formalism Using Quaternions for Six-Dimensional Spacetimes - INSPIRE

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Two-Component Spinorial Formalism Using Quaternions for Six-Dimensional Spacetimes

Joás Venâncio
(
- Pernambuco U.
)
,
Carlos Batista
(
- Pernambuco U.
)

Jul 10, 2020

48 pages

Published in:

Adv.Appl.Clifford Algebras 31 (2021) 5, 71

Published: Sep 23, 2021

e-Print:

2007.04296 [hep-th]

DOI:

10.1007/s00006-021-01172-1

View in:

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Abstract: (Springer)

In this article we construct and discuss several aspects of the two-component spinorial formalism for six-dimensional spacetimes, in which chiral spinors are represented by objects with two quaternionic components and the spin group is identified with

SL(2,\mathbb {H})

, which is a double covering for the Lorentz group in six dimensions. We present the fundamental representations of this group and show how vectors, bivectors, and 3-vectors are represented in such spinorial formalism. We also complexify the spacetime, so that other signatures can be tackled. We argue that, in general, objects built from the tensor products of the fundamental representations of

SL(2,\mathbb {H})

do not carry a representation of the group, due to the non-commutativity of the quaternions. The Lie algebra of the spin group is obtained and its connection with the Lie algebra of SO(5, 1) is presented, providing a physical interpretation for the elements of

SL(2,\mathbb {H})

. Finally, we present a bridge between this quaternionic spinorial formalism for six-dimensional spacetimes and the four-component spinorial formalism over the complex field that comes from the fact that the spin group in six-dimensional Euclidean spaces is given by SU(4).

Note:

47 pages

Spinors
Quaternions
Six dimensions
Lorentz transformations
dimension: 6
group: representation
algebra: Lie
group: Lorentz
algebra: spin
space: Euclidean

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