Abstract
Qubit,as the basic unit of quantum operations,has at least two quantum states for superposition.Diamond itself has no superimposable quantum states,but after injecting N atoms,the resulted nitrogen-vacancy centers form excellent-performance qubits.For the same purpose,we can also obtain qubits by modifying the matrix without effective quantum states.HKUST-1({Cu3(BTC)2(H2O)3},BTC=1,3,5-benzene-tricarboxylate)with S=0 ground state is electron paramagnetic resonance(EPR)silent,so it is not a qubit candidate.However,the spontaneously hydrolyzed HKUST-1 produces dilute uncoupled CuⅡ ions with S=1/2.In this paper,we utilized the hydrolysis products of HKUST-1 to obtain qubits and assembled a core-shell structural HKUST-1@ZIF-8 by ZIF-8({Zn(mim)2},mim=2-methylimidazole)coated over HKUST-1 for controlling the hydrolysis.The experimental results clearly show that the qubits come from hydrolyzed CuⅡ ions.Furthermore,the dilute uncoupled CuⅡ ions in this assembly can effectively reduce the decoherence of qubits.The EPR studies show that the T2 of this compound is 1067 ns at 10 K.
基金项目
National Key Research and Development Program of China(2021YFA1600304)
Joint Fund for Regional Innovation and Development(U20A2073)
National Natural Science Foundation of China(21973038)
National Natural Science Foundation of China(62005297)
National Natural Science Foundation of China(22105089)
Interdisciplinary Program of Wuhan National High Magnetic Field Center(WHMFC202133)
Natural Science Foundation of Jiangxi Province(20224BAB214005)
Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry(20212BCD42018)
维普
万方数据