Fractional Quantum Heat Engine

Floquet engineering flat bands for bosonic fractional quantum Hall in small lattices

The quest to realize novel phases of matter with topological order is an important pursuit with implications for strongly correlated physics and quantum information. Utilizing ideas from state-of-the-art coherent control of artificial quantum systems such as superconducting circuits, we present a proposal to realize bosonic fractional quantum Hall physics on small lattices by creating nearly flat topological bands using staggered flux patterns. Fingerprints of fractionalization through charge pumping can be observed with nearly perfect quantization using as few as 24 lattice sites (two photons…

分数阶量子斯特林热机性能改进

Performance improvement of a fractional quantum Stirling heat engine

研究将分数阶量子力学引入量子斯特林热机循环，提出利用分数阶参数控制热力学循环的新方法，发现调节该参数可扩展实现完美回热与Carnot效率的区域。

Adaptive Quantum Heat Engines

For heat engines working between two heat baths, functionality is often conditioned on a set of fixed constraints such as given internal structure of the engine and given temperatures for the baths. It is, however, important to devise heat engines which can function adaptively, in particular when the engine is a quantum system and the baths are subject to fluctuations. Here we study a model for an adaptive quantum heat engine whose heat baths can have variable temperatures. We obtain conditions under which such an engine can still operate. Moreover, we propose an enhancement of the heat engine…

Quantum heat engine with continuum working medium

We introduce a new quantum heat engine, in which the working medium is a quantum system with a discrete level and a continuum. Net work done by this engine is calculated and discussed. The results show that this quantum heat engine behaves like the two-level quantum heat engine in both the high-temperature and the low-temperature limits, but it operates differently in temperatures between them. The efficiency of this quantum heat engine is also presented and discussed.

Holographic Heat Engines as Quantum Heat Engines

Certain solutions of Einstein's equations in anti-de Sitter spacetime can be engineered, using extended gravitational thermodynamics, to yield `holographic heat engines', devices that turn heat into useful mechanical work. On the other hand, there are constructions (both experimental and theoretical) where a series of operations is performed on a small quantum system, defining what are known as `quantum heat engines'. We propose that certain holographic heat engines can be considered models of quantum heat engines, and the possible fruitfulness of this connection is discussed. Motivated by fea…

分数幂律势下的多玻色子量子Szilard引擎

Many boson quantum Szilard engine for fractional power law potential

本文基于Bose-Einstein统计和能量量子化，实现了非相互作用玻色子在分数幂律势及单粒子在Morse势中的量子Szilard引擎，分析了粒子数、势深度、温度与非谐性参数对功和效率的影响并进行了比较。