Entangled quantum Unruh Otto engine is more efficient

TL;DR

This paper introduces a relativistic quantum Otto engine using entangled qubits with efficiency surpassing traditional single-qubit engines, influenced by acceleration and entanglement, and provides a detailed construction protocol.

Contribution

It presents a novel relativistic quantum Otto cycle leveraging entanglement and acceleration effects, enhancing efficiency beyond standard single-qubit engines.

Findings

Efficiency depends on energy gap and relative acceleration.

Lower acceleration of the observer's qubit increases efficiency.

A complete protocol for constructing the cycle is provided.

Abstract

We propose a relativistic quantum Otto cycle between an entangled state of two qubits and their composite excited (or ground) state whose efficiency can be greater than the usual single qubit quantum Otto engine. The hot and cold reservoirs are constructed by providing uniform accelerations to these qubits along with the interaction between the background field and individual qubits. The efficiency, as measured from one of the qubits' frame, not only depends on the energy gap of the states but also the relative acceleration between them. For lower acceleration of our observer's qubit compared to the other one, the cycle is more efficient than the single qubit quantum Otto engine. Furthermore, a complete protocol to construct such a cycle is being provided.