| Nonlocal advantage of quantum coherence in a dephasing channel with memory |
| |
| 作者姓名： | 胡明亮 张宇晗 范桁 |
| |
| 作者单位： | School of Science;Institute of Physics;CAS Center for Excellence in Topological Quantum Computation;Songshan Lake Materials Laboratory |
| |
| 基金项目： | Project supported by the National Natural Science Foundation of China(Grant Nos.11675129,11774406,and 11934018);the National Key R&D Program of China(Grant Nos.2016YFA0302104 and 2016YFA0300600);the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB28000000);the Research Program of Beijing Academy of Quantum Information Sciences(Grant No.Y18G07). |
| |
| 摘 要： | We investigate nonlocal advantage of quantum coherence(NAQC)in a correlated dephasing channel modeled by themultimode bosonic reservoir.We obtain analytically the dephasing and memory factors of this channel for the reservoirhaving a Lorentzian spectral density,and analyze how they affect the NAQC defined by the l1 norm and relative entropy.It is shown that the memory effects of this channel on NAQC are state-dependent,and they suppress noticeably the rapiddecay of NAQC for the family of input Bell-like states with one excitation.For the given transmission time of each qubit,we also obtain the regions of the dephasing and memory factors during which there is NAQC in the output states.
|
| 关 键 词： | quantum coherence correlated quantum channel memory effects |
Nonlocal advantage of quantum coherence in a dephasing channel with memory |
| |
| Ming-Liang Hu,Yu-Han Zhang,Heng Fan.Nonlocal advantage of quantum coherence in a dephasing channel with memory[J].Chinese Physics B,2021(3). |
| |
| Authors: | Ming-Liang Hu Yu-Han Zhang Heng Fan |
| |
| Affiliation: | (School of Science,Xi’an University of Posts and Telecommunications,Xi’an 710121,China;Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100190,China;Songshan Lake Materials Laboratory,Dongguan 523808,China) |
| |
| Abstract: | We investigate nonlocal advantage of quantum coherence(NAQC) in a correlated dephasing channel modeled by the multimode bosonic reservoir. We obtain analytically the dephasing and memory factors of this channel for the reservoir having a Lorentzian spectral density, and analyze how they affect the NAQC defined by the l1 norm and relative entropy.It is shown that the memory effects of this channel on NAQC are state-dependent, and they suppress noticeably the rapid decay of NAQC for the family of input Bell-like states with one excitation. For the given transmission time of each qubit,we also obtain the regions of the dephasing and memory factors during which there is NAQC in the output states. |
| |
| Keywords: | |
| 本文献已被 CNKI 维普 等数据库收录！ |
