# Constrained Dynamics of Tachyon Field in FRWL Spacetime

## TL;DR

This paper investigates the constrained dynamics of a tachyon scalar field with a DBI action in FRWL spacetime, introducing an auxiliary field to develop a new set of regularity-satisfying constraints.

## Contribution

It presents an extended system with an auxiliary field and constructs a new set of constraints for tachyon dynamics in cosmology.

## Key findings

- New equivalent constraints satisfying regularity conditions
- Extended system with auxiliary field in minisuperspace
- Framework for analyzing tachyon fields in cosmology

## Abstract

In this paper we continue study of tachyon scalar field described by a Dirac-Born-Infeld (DBI) type action with constraints in the cosmological context. The proposed extension of the system introducing an auxiliary field in the minisuperspace framework is discussed. A new equivalent set of constraints is constructed, satisfying the usual regularity conditions.

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Source: https://tomesphere.com/paper/1904.11341