English

Dynamics of cohering and decohering power under Markovian channels

Quantum Physics 2017-12-06 v1

Abstract

In this paper, we investigate the cohering and decohering power for the one-qubit Markovian channels with respect to coherence in terms of the l1l_{1}-norm, the Reˊ\acute{e}nyi α\alpha-relative entropy and the Tsallis α\alpha-relative entropy. In the case of α=2\alpha=2, the cohering and decohering power of the amplitude damping channel, the phase damping channel, the depolarizing channel, and the flip channels under the three measures of coherence are calculated analytically. The decohering power on the x,y,zx, y, z basis referring to the amplitude damping channel, the phase damping channel, the flip channel for every measure we investigated is equal. This property also happens in the cohering power of the phase damping channel, the depolarizing channel, and the flip channels. However, the decohering power of the depolarizing channel is independent to the reference basis, and the cohering power of the amplitude damping channel on the x,yx, y basis is different to that on the zz basis.

Keywords

Cite

@article{arxiv.1612.05355,
  title  = {Dynamics of cohering and decohering power under Markovian channels},
  author = {Ming-Ming Chen and Yu Luo and Lian-He Shao and Yong-Ming Li},
  journal= {arXiv preprint arXiv:1612.05355},
  year   = {2017}
}

Comments

11 pages, 4 figures.Because the picture is too big, this paper makes some delation. Formally submitted version is slightly different to this paper