期刊
PHYSICAL REVIEW A
卷 79, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.032322
关键词
quantum computing; quantum entanglement; random processes
资金
- FAPERJ
- PROBRAL CAPES/DAAD Project
- Brazilian Millenium Institute for Quantum Information
- EU QAP
- Spanish MEC [FIS2007-60182]
- Consolider-Ingenio QOIT projects
- Generalitat de Catalunya
- Alexander von Humboldt foundation
- ICREA Funding Source: Custom
We derive analytical upper bounds for the entanglement of generalized Greenberger-Horne-Zeilinger states coupled to locally depolarizing and dephasing environments and for local thermal baths of arbitrary temperature. These bounds apply for any convex quantifier of entanglement, and exponential entanglement decay with the number of constituent particles is found. The bounds are tight for depolarizing and dephasing channels. We also show that randomly generated initial states tend to violate these bounds and that this discrepancy grows with the number of particles.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据