# Conical Holographic Heat Engines

## TL;DR

This paper investigates how conical deficits and acceleration affect the efficiency of black hole holographic heat engines, providing new formulas for efficiency calculations and revealing contrasting effects of conical deficits and acceleration.

## Contribution

It introduces the impact of conical deficits and acceleration on heat engine efficiency and presents a new formula for elliptical cycle efficiency calculations.

## Key findings

- Adding conical deficits increases efficiency.
- Black hole acceleration decreases efficiency.
- New formula simplifies efficiency computation for elliptical cycles.

## Abstract

We demonstrate that adding a conical deficit to a black hole holographic heat engine increases its efficiency; in contrast, allowing a black hole to accelerate {\it decreases} efficiency if the same average conical deficit is maintained. Adding other charges to the black hole does not change this qualitative effect. We also present a simple formula to calculate the efficiency of elliptical cycles for any $C_V\neq 0$ black hole, which allows a more efficient numerical algorithm for computation.