A quantum otto heat engine driven by three quantum dots
量子点
量子
热机
物理
量子力学
热力学
作者
Y. Khlifi,Sanaa Abaach,M. El Baz,El Allati A
出处
期刊:Physica Scripta [IOP Publishing] 日期:2024-06-07卷期号:99 (7): 075967-075967被引量:1
标识
DOI:10.1088/1402-4896/ad55b6
摘要
Abstract A quantum heat engine composed of three coupled quantum dots as a working substance is proposed. Since quantum dots naturally obey the Fermi Hubbard Hamiltonian, the strong coupling interaction regime allows the working substance to be evaluated under an effective Heisenberg Hamiltonian. Indeed, the influence of the strength coupling, between the three dots, on quantum machine efficiency and work in the presence of a homogeneous magnetic field is also examined. Furthermore, the influence of entanglement on the efficiency & work of the quantum dot Otto heat engine is well analyzed. As a tripartite working substance, we are interested in analyzing the local work and efficiency associated with each single and pair of quantum dots. The results show that the local efficiency associated with a pair of quantum dots achieves a maximum value, unlike the global efficiency. Indeed, the entanglement impact on Global/local work is studied.