Topological phase transitions, Majorana modes, and quantum simulation of the Su–Schrieffer–Heeger model with nearest-neighbor interactions

Autor:	Liang Jiang, Liang-Jian Zou, Xiang-Long Yu, Tong Wu, Ya-Min Quan, Yuanzhen Chen, Jiansheng Wu
Rok vydání:	2020
Předmět:	Josephson effect Physics Quantum simulator 02 engineering and technology 021001 nanoscience & nanotechnology Topology 01 natural sciences Quantum circuit MAJORANA Mean field theory 0103 physical sciences Bound state Cooper pair 010306 general physics 0210 nano-technology Wave function
Zdroj:	Physical Review B. 101
ISSN:	2469-9969 2469-9950
Popis:	The Su--Schrieffer--Heeger (SSH) model is one of the simplest topological lattice models and is a promising candidate for quantum simulations of topological systems. In this study we investigate an interacting SSH model with nearest-neighbor interactions using mean field theory and an exact diagonalization method after the Jordan-Wigner transformation. We obtain a rich phase diagram with six different phases. Majorana bound states are found and confirmed by analyzing wave functions and Majorana number. In addition, we propose to use superconducting devices to construct a one-dimensional quantum circuit, where Cooper pair boxes and Josephson junctions are alternately connected in series, to theoretically simulate the interacting SSH model. This approach also provides us a toolkit to simulate correlated topological systems.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::55caac8542d12eac1c78c948ad875c81 https://doi.org/10.1103/physrevb.101.045422 Zobrazit plný text záznamu