Tracking quantum state evolution by the Berry curvature with a two-level system

Autor:	Zhang, Ze-Lin, Xu, Ping, Yang, Zhen-Biao
Rok vydání:	2021
Předmět:	Quantum Physics
Zdroj:	Eur. Phys. J. Plus (2021) 136:270
Druh dokumentu:	Working Paper
DOI:	10.1140/epjp/s13360-021-01258-6
Popis:	We investigate two kinds of topological structures (sphere and torus) spanned by the controlled parameters of a driven two-level system's Hamiltonian, and consider the connection between the structures and the system's dynamics. We discuss the Berry curvature obtained through the dynamical response method, show the certain physical and observable manifolds including the gapped region probed by integrating the Berry curvature, and demonstrate the system's state evolution can be tracked and manipulated by extracting the Berry curvature. Comment: 10 pages, 5 figures, 1 appendix, accepted for publication in EPJP, Comments welcome
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2102.00808 Zobrazit plný text záznamu View this record from Arxiv