Experimental Protection of the Spin Coherence of a Molecular Qubit Exceeding a Millisecond  

作　　者：Yingqiu Dai Yue Fu Zhifu Shi Xi Qin Shiwei Mu Yang Wu Ji-Hu Su Yi-Fei Deng Lei Qin Yuan-Qi Zhai Yan-Zhen Zheng Xing Rong Jiangfeng Du 代映秋;伏月;石致富;秦熙;穆世伟;伍旸;苏吉虎;邓义飞;秦雷;翟沅琦;郑彦臻;荣星;杜江峰(Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China;CAS Key Laboratory of Microscale Magnetic Resonance,University of Science and Technology of China,Hefei 230026,China;Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China;Frontier Institute of Science and Technology(FIST),Xi’an Jiaotong University,Xi’an 710054,China)

机构地区：[1]Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China [2]CAS Key Laboratory of Microscale Magnetic Resonance,University of Science and Technology of China,Hefei 230026,China [3]Synergetic Innovation Center of Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China [4]Frontier Institute of Science and Technology(FIST),Xi’an Jiaotong University,Xi’an 710054,China

出　　处：《Chinese Physics Letters》2021年第3期12-16,共5页中国物理快报（英文版）

基　　金：Supported by the National Key R&D Program of China(Grant Nos.2018YFA0306600 and 2016YFB0501603);the Chinese Academy of Sciences(Grant Nos.GJJSTD20170001,QYZDY-SSW-SLH004,and QYZDB-SSW-SLH005);Anhui Initiative in Quantum Information Technologies(Grant No.AHY050000);the Youth Innovation Promotion Association of Chinese Academy of Sciences for their support;the support from Wuhan National High Magnetic Field Center(Grant No.2015KF06)。

摘　　要：Molecular qubits are promising as they can benefit from tailoring and versatile design of chemistry.It is essential to reduce the decoherence of molecular qubits caused by their interactions with the environment.Herein the dynamical decoupling(DD)technique is utilized to combat such decoherence.The coherence time for a transitionmetal complex(PPh_(4))_(2)[Cu(mnt)_(2)]is prolonged from 6.8μs to 1.4 ms.The ratio of the coherence time and the length ofπ/2 pulse,defined as the single qubit figure of merit(QM),reaches 1.4×10^(5),which is 40 times greater than what previously reported for this molecule.Our results show that molecular qubits,with milliseconds coherence time,are promising candidates for quantum information processing.

关 键 词：MOLECULAR VERSATILE utilized 

分 类 号：O561[理学—原子与分子物理]