Magnetic Field Measurement with Heisenberg Limit Based on Solid Spin NOON State  

作　　者：周雷鸣 董杨 孙方稳 

机构地区：[1]Key Laboratory of Quantum Information,and Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China

出　　处：《Chinese Physics Letters》2015年第6期164-168,共5页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Program of China(No 2011CB921200);the Strategic Priority Research Program(B)of the Chinese Academy of Sciences under Grant (No XDB01030200);the National Natural Science Foundation of China(No11374290);the Fundamental Research Funds for the Central Universities and the Foundation for Authors of National Excellent Doctoral Dissertation of China

摘　　要：The maximum entangled number state （NOON state） can improve the sensitivity of physical quantity measure- ment to the Heisenberg limit 1/N. In this work, the magnetic field measurement based on the individual solid spin NOON state is investigated. Based on the tunable effective coupling coefficient, we propose a generation scheme of the three-spin NOON state, i.e, the Creenberger-Horne-Zeilinger （CHZ） state, and discussed the mea- surement resolution reduction due to decoherence. It is unnecessary to entangle spins as many as possible when decoherence exists. In practice, defect spins in diamond and alp donors with long coherence time can be applied with current techniques in the nano-scaled high resolution magnetic measurement.The maximum entangled number state （NOON state） can improve the sensitivity of physical quantity measure- ment to the Heisenberg limit 1/N. In this work, the magnetic field measurement based on the individual solid spin NOON state is investigated. Based on the tunable effective coupling coefficient, we propose a generation scheme of the three-spin NOON state, i.e, the Creenberger-Horne-Zeilinger （CHZ） state, and discussed the mea- surement resolution reduction due to decoherence. It is unnecessary to entangle spins as many as possible when decoherence exists. In practice, defect spins in diamond and alp donors with long coherence time can be applied with current techniques in the nano-scaled high resolution magnetic measurement.

关 键 词：Magnetic Field Measurement with Heisenberg Limit Based on Solid Spin NOON State 

分 类 号：O469[理学—凝聚态物理]