In this paper, we analyze the sub-fidelity and super-fidelity of an arbitrary pair of n-mode Gaussian states.Particularly, an explicit formula for the sub-fidelity and super-fidelity between any two-mode Gaussian stat...In this paper, we analyze the sub-fidelity and super-fidelity of an arbitrary pair of n-mode Gaussian states.Particularly, an explicit formula for the sub-fidelity and super-fidelity between any two-mode Gaussian states is obtained.展开更多
We study the geometric measure of quantum coherence recently proposed in [Phys. Rev. Lett. 115(2015)020403]. Both lower and upper bounds of this measure are provided. These bounds are shown to be tight for a class of ...We study the geometric measure of quantum coherence recently proposed in [Phys. Rev. Lett. 115(2015)020403]. Both lower and upper bounds of this measure are provided. These bounds are shown to be tight for a class of important coherent states—maximally coherent mixed states. The trade-off relation between quantum coherence and mixedness for this measure is also discussed.展开更多
基金Supported by Natural Science Foundation of China under Grant Nos.11171249,11201329Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi
文摘In this paper, we analyze the sub-fidelity and super-fidelity of an arbitrary pair of n-mode Gaussian states.Particularly, an explicit formula for the sub-fidelity and super-fidelity between any two-mode Gaussian states is obtained.
基金Supported by the National Basic Research Program of China under Grant No.2015CB921002the National Natural Science Foundation of China under Grant Nos.11175094,91221205,11275131+2 种基金Fundamental Research Funds for the Central Universities under Grant No.16CX02049Athe Shandong Provincial Natural Science Foundation under Grant No.ZR2016AQ06the Postdoctor Science Foundation under Grant No.2016M600997
文摘We study the geometric measure of quantum coherence recently proposed in [Phys. Rev. Lett. 115(2015)020403]. Both lower and upper bounds of this measure are provided. These bounds are shown to be tight for a class of important coherent states—maximally coherent mixed states. The trade-off relation between quantum coherence and mixedness for this measure is also discussed.
