不同耦合构型多自旋体系单重态制备效率研究

王子文,辛家祥,魏达秀,姚叶锋

Preparation Efficiency of Singlet States in Multi-spin Systems with Different Coupling Configurations

WANG Ziwen,XIN Jiaxiang,WEI Daxiu,YAO Yefeng

图5 利用优化控制方法制备单重态并滤波的脉冲序列图. 初态经过OC I脉冲作用后转化为$\rho_{\mathrm{SO}}$态，之后的滤波模块（FCW）将非单重态信号散相，其中CW去耦脉冲用于保留单重态信号，两个90?脉冲相位分别为x、y，OC II脉冲将$\rho_{\mathrm{SS}}$转化为单量子态，以观测磁共振信号

Fig. 5 Pulse sequence based on the optimal controlled singlet state preparation. OC I is to transfer the initial state into $\rho_{\mathrm{SO}}$. The following filtering module is to dephase unwanted signals. The CW is used to store the singlet state. The phases of the two 90-degree pulses are x and y respectively. The OC II module is to convert $\rho_{\mathrm{SS}}$ to single quantum state