Many-body quantum heat engines with shortcuts to adiabaticity

Autor:	Hartmann, Andreas, Mukherjee, Victor, Niedenzu, Wolfgang, Lechner, Wolfgang
Rok vydání:	2019
Předmět:	Quantum Physics Condensed Matter - Statistical Mechanics
Zdroj:	Phys. Rev. Research 2, 023145 (2020)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevResearch.2.023145
Popis:	Quantum heat engines are modeled by thermodynamic cycles with quantum-mechanical working media. Since high engine efficiencies require adiabaticity, a major challenge is to yield a nonvanishing power output at finite cycle times. Shortcuts to adiabaticity using counter-diabatic (CD) driving may serve as a means to speed up such, otherwise infinitely long, cycles. We introduce local approximate CD protocols for many-body spin quantum heat engines and show that this method improves the efficiency and power for finite cycle times considerably. The protocol does not require a priori knowledge of the system eigenstates and is thus realistic in experiments. Comment: 15 pages, 7 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1912.08689 Zobrazit plný text záznamu View this record from Arxiv