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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

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Published on: September 8, 2023

Bath Engineering Enhanced Quantum Critical Engines.

Revathy B S¹, Victor Mukherjee², Uma Divakaran¹

¹Department of Physics, Indian Institute of Technology Palakkad, Palakkad 678557, India.

Entropy (Basel, Switzerland)

|July 8, 2023

Summary

We introduce a bath-engineered quantum engine (BEQE) protocol to enhance quantum engine performance near quantum phase transitions. This method improves finite-time engine efficiency, outperforming adiabatic and even infinite-time engines in free fermionic systems.

Keywords:

Kibble–Zurek mechanism quantum control quantum heat engines quantum phase transitions quantum thermodynamics

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Area of Science:

Quantum thermodynamics
Quantum phase transitions
Quantum engine design

Background:

Driving quantum systems across quantum critical points causes non-adiabatic excitations.
These excitations can negatively impact quantum machines utilizing quantum critical working media.

Purpose of the Study:

To propose a novel protocol, the bath-engineered quantum engine (BEQE), for enhancing quantum engine performance.
To leverage the Kibble-Zurek mechanism and critical scaling laws for finite-time quantum engines operating near quantum phase transitions.

Main Methods:

Formulation of a BEQE protocol using Kibble-Zurek mechanism and critical scaling laws.
Analysis of the protocol's performance in free fermionic systems.

Main Results:

The BEQE protocol significantly enhances the performance of finite-time quantum engines near quantum phase transitions.
In free fermionic systems, BEQE-powered engines outperform those using shortcuts to adiabaticity.
Under specific conditions, BEQE can even surpass the performance of infinite-time engines.

Conclusions:

Bath-engineered quantum engines offer remarkable advantages for improving quantum engine efficiency.
The BEQE protocol shows significant potential for practical quantum machine applications.
Further research is needed to explore BEQE in non-integrable quantum models.