# Energy conditions in Starobinsky supergravity

## TL;DR

This paper investigates classical energy conditions within Starobinsky supergravity, revealing violations of the strong energy condition during inflation and dark energy scenarios, while null and weak conditions are preserved.

## Contribution

It provides a detailed analysis of energy conditions in the simplest Starobinsky supergravity model, highlighting conditions' violations due to extra scalar degrees of freedom.

## Key findings

- Null and weak energy conditions are preserved.
- Strong energy condition is violated during inflation and dark energy.
- Examples of violations depend on parameter ranges.

## Abstract

We consider the classical energy conditions (strong, null and weak) in Starobinsky supergravity theories. We study in detail the simplest Starobinsky supergravity model in the "old-minimal" supergravity setup and find examples of violations of each energy condition for a certain range of the parameters due to extra scalar d.o.f. present in supergravity. We find the null and weak energy conditions to be preserved and the strong energy condition to be violated in the physically relevant examples such as inflation and dark energy.