Entanglement Protection of Two‐Qubit System in Non‐Markovian Reservoir via Weak Measurement and Weak Measurement Reversal. Issue 3 (1st May 2019)

• Record Type: Journal Article
• Authors: Guo, Xiuli; Zhang, Yanliang; Kang, Guodong; Zhou, Qingping
• Is Part Of: Chinese journal of electronics. Volume 28:Issue 3(2019)
• Page Start: 593
• Page End: 597
• Publication Date: 2019-05-01
• Subjects: Entanglement protection -- Weak measurement -- Weak measurement reversal -- Non‐Makovain environment; quantum computing -- quantum entanglement; Entanglement sudden death -- initial entangled state -- entangled atoms -- nonMakovain environment -- independent reservoirs -- protection performance -- pre‐WM -- post‐WMR -- posterior Weak measurement reversal -- nonMarkovian reservoirs -- protection schemes -- nonmarkovian reservoir -- two‐qubit system -- Entanglement protection; Electronics -- Periodicals; Electronics -- China -- Periodicals; Electronics; China; Periodicals; 621.38105
• DOI: 10.1049/cje.2018.06.004
• Languages: English
• ISSNs: 1022-4653

Abstract

Abstract : The protection schemes of the entanglement in the system of two entangled atoms from nonMarkovian reservoirs via previous Weak measurement (pre‐WM) and posterior Weak measurement reversal (post‐WMR) are investigated. We firstly compare the effects of combination applying of pre‐WM and post‐WMR (scheme 1) and twice Weak measurements (WMs) (scheme 2) in the condition of different initial entangled states. The analysis indicates that the protection performance of scheme 1 is much better than that of scheme 2. The scheme 1 was utilized when the system of two entangled atoms suffers from the independent reservoirs. The numerical results show that the combination of pre‐WM and post‐WMR can effectively enhance entanglement and shorten the time of Entanglement sudden death (ESD) in non‐Makovain environment. We have found the optimum of WM strengthens is drastically related to the initial entangled state.