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Quantum coherence in mutually unbiased bases

  • Yao-Kun Wang
  • Li-Zhu Ge
  • Yuan-Hong TaoEmail author
Article
  • 38 Downloads

Abstract

We investigate the \(l_{1}\) norm of coherence of quantum states in mutually unbiased bases. We find that the sum of squared \(l_{1}\) norm of coherence of single qubit mixed state is less than two. We derive that the \(l_{1}\) norms of coherence of three classes of X states in nontrivial mutually unbiased bases for 4-dimensional Hilbert space are equal. We propose the concept of “autotensor of mutually unbiased basis (AMUB)” by the tensor of mutually unbiased bases and depict the level surface of the constant sum of the \(l_{1}\) norm of coherence of Bell-diagonal states in AMUB. We find that the \(l_{1}\) norms of coherence of Werner states and isotropic states in AMUB are equal, respectively.

Keywords

Quantum coherence Mutually unbiased bases Bell-diagonal states Werner states Isotropic states 

Notes

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of MathematicsTonghua Normal UniversityTonghuaChina
  2. 2.Research Center for Mathematics, College of MathematicsTonghua Normal UniversityTonghuaChina
  3. 3.The Branch Campus of Tonghua Normal UniversityTonghuaChina
  4. 4.Department of Mathematics, College of SciencesYanbian UniversityYanjiChina

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