典型文献
Alternative non-Gaussianity measures for quantum states based on quantum fidelity
文献摘要：
We propose three alternative measures for non-Gaussianity of quantum states:sine distance,Bures angle,and Bures distance,which are based on quantum fidelity introduced by Wang[Phys.Lett.A 373 58(2008)].Using them,we evaluate the non-Gaussianity of some relevant single-mode and two-mode non-Gaussian states and find a good consistency of the three examined measures.In addition,we show that such metrics can exactly quantify the degree of Gaussianity of even Schr?dinger-cat-like states of small amplitudes that can not be measured by other known non-Gaussianity measures such as the Hilbert-Schmidt metric and the relative entropy metric.We make a comparative study between all existing non-Gaussianity measures according to the metric axioms and point out that the sine distance is the best candidate among them.
文献关键词：
中图分类号：
作者姓名：
Cheng Xiang;Shan-Shan Li;Sha-Sha Wen;Shao-Hua Xiang
作者机构：
College of Electrical and Information Engineering,Huaihua University,Huaihua 418008,China;Hunan Provincial Key Laboratory of Ecological Agriculture Intelligent Control Technology,Huaihua 418008,China
文献出处：
引用格式：
[1]Cheng Xiang;Shan-Shan Li;Sha-Sha Wen;Shao-Hua Xiang-.Alternative non-Gaussianity measures for quantum states based on quantum fidelity)[J].中国物理B（英文版）,2022(03):215-223
A类：
Bures,axioms
B类：
Alternative,Gaussianity,measures,quantum,states,fidelity,We,propose,three,alternative,sine,distance,angle,which,are,introduced,by,Wang,Phys,Lett,Using,them,evaluate,some,relevant,single,mode,two,find,good,consistency,examined,In,addition,show,that,such,metrics,exactly,quantify,degree,even,Schr,dinger,cat,like,small,amplitudes,not,measured,other,known,Hilbert,Schmidt,relative,entropy,make,comparative,study,between,existing,according,point,out,best,candidate,among
AB值：
0.513027
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