Controlling group velocity in a superconductive quantum circuit  

作　　者：邱田会 杨国建 

机构地区：[1]Department of Physics and Applied Optics Beijing Area Major Laboratory,Beijing Normal University

出　　处：《Chinese Physics B》2012年第10期274-278,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 111174040);the Fundamental Research Funds for the Central Universities

摘　　要：We investigate the controllable group velocity of a microwave probe field in a superconductive quantum circuit（SQC） pumped by microwave fields,and the use of such a SQC function as an artificial Λ-type three-level atom.The exchange between the subluminal and the superluminal states of the probe field can be realized simply by sweeping the pumping intensity,and the superluminal state is usually realized with a lower absorption.This work is one of the efforts to extend the study of electromagnetically induced transparency and its related properties from the lightwave band to the microwave band.We investigate the controllable group velocity of a microwave probe field in a superconductive quantum circuit（SQC） pumped by microwave fields,and the use of such a SQC function as an artificial Λ-type three-level atom.The exchange between the subluminal and the superluminal states of the probe field can be realized simply by sweeping the pumping intensity,and the superluminal state is usually realized with a lower absorption.This work is one of the efforts to extend the study of electromagnetically induced transparency and its related properties from the lightwave band to the microwave band.

关 键 词：SUBLUMINAL SUPERLUMINAL superconductive quantum circuit group velocity 

分 类 号：O511.9[理学—低温物理]