Sudden change of interferometric power for X-shape states  

作　　者：Dian Zhu Fu-Lin Zhang Jing-Ling Chen 朱典;张福林;陈景灵

机构地区：[1]Theoretical Physics Division,Chern Institute of Mathematics,Nankai University,Tianjin 300071,China [2]Department of Physics,School of Science,Tianjin University,Tianjin 300072,China

出　　处：《Chinese Physics B》2025年第2期133-139,共7页中国物理B(英文版)

基　　金：Project supported by the National Natural Science Foundations of China (Grant Nos. 11675119,12275136,and 12075001);the Nankai Zhide Foundations。

摘　　要：Quantum interferometric power(IP), a discordlike measure, plays an important role in quantum metrology. We study the dynamics of IP for two-qubit X-shape states under different noisy environments. Our study shows that IP exhibits sudden change, and one side quantum channel is enough for the occurrence of a sudden change of IP. In particular, we show that the initial state having no sudden change of quantum discord exhibits a sudden change of IP under the dynamics of amplitude noise, but the converse is not true. Besides, we also investigate the dynamics of IP under two different kinds of composite noises. Our results also confirm that sudden change of IP occurs under such composite noises.

关 键 词：quantum interferometric power quantum noise sudden change 

分 类 号：O41[理学—理论物理]