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
• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: GENERAL
• 页码范围: 12-16,中插7-中插10
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/0256-307X/38/3/030303

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 transition-metal complex (PPh4)2[Cu(mnt)2] is prolonged from 6.8 μs to 1.4 ms. The ratio of the coherence time and the length ofπ/2 pulse, defined as the single qubitfigure of merit (QM), reaches 1.4 × 105, 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.