Engineering a heat engine purely driven by quantum coherence

  title={Engineering a heat engine purely driven by quantum coherence},
  author={Stefan Aimet and Hyukjoon Kwon},
  journal={Physical Review A},
The question of whether quantum coherence is a resource beneficial or detrimental to the performance of quantum heat engines has been thoroughly studied but remains undecided. To isolate the contribution of coherence, we analyze the performance of a purely coherence-driven quantum heat engine, a device that does not include any heat flow during the thermodynamic cycle. The engine is powered by the coherence of a multiqubit system, where each qubit is charged via interaction with a coherence bath… 

Figures from this paper



Work and Fluctuations: Coherent vs. Incoherent Ergotropy Extraction

We consider a quasi-probability distribution of work for an isolated quantum system coupled to the energy-storage device given by the ideal weight. Specif-ically, we analyze a trade-off between

Optimizing autonomous thermal machines powered by energetic coherence

The characterization and control of quantum effects in the performance of thermodynamic tasks may open new avenues for small thermal machines working in the nanoscale. We study the impact of

and a at

The xishacorene natural products are structurally unique apolar diterpenoids that feature a bicyclo[3.3.1] framework. These secondary metabolites likely arise from the well-studied, structurally

Roles of quantum coherences in thermal machines

In this review, the recent developments regarding the role of quantum coherences in the performances of thermal machines --the devices realising the above thermodynamic operations are presented.

Quantum Thermodynamics and Optomechanics

Thermodynamics was developed in the 19th century to study steam engines using the cyclical transformations of a working substance to extract heat from thermal baths and convert it into work, possibly

I and J

Extracting Work from a Single Heat Bath via Vanishing Quantum Coherence

We present here a quantum Carnot engine in which the atoms in the heat bath are given a small bit of quantum coherence. The induced quantum coherence becomes vanishingly small in the high-temperature

A Group-Theoretical Approach to Quantum Optics: Models of Atom-Field Interactions

Introduction 1. Atomic Kinematics 2. Atomic Dynamics 3. Quantized Electromagnetic Fields 4. Field Dynamics 5. Jaynes-Cummings Model 6. Collective Interactions 7. Atomic Systems in a strong Quantum