# Whether Lyra's Manifold Itself is a Hidden Source of Dark Energy

## TL;DR

This paper explores how the geometry of Lyra's manifold may inherently act as a source of dark energy, potentially explaining the universe's accelerated expansion.

## Contribution

It demonstrates that Lyra's manifold geometry can serve as a natural source of dark energy, resembling quintessence or cosmological constant types.

## Key findings

- Lyra's manifold geometry behaves as a source of dark energy.
- The energy form is similar to quintessence or cosmological constant.
- Implications for explaining accelerated cosmic expansion.

## Abstract

In the course of investigation of some interesting cosmic string universes in the five dimensional Lyra manifold it is excitingly found that the geometry itself of Lyra manifold behaves as a new source of dark energy and this energy takes a form similar to that of quintessence in most of the cases, though in one case the dark energy comes out to be that of the cosmological constant type. The behaviour of the universes and their contribution to the process of evolution are examined. Further study of such type of universes will be very helpful in explaining the present accelerated expansion behaviour of the universe.