title: Observing quantum oscillation of ground states in single molecular magnet.
abstract: Single molecular magnets (SMMs) are among the potential systems for quantum memory and quantum information processing. Quantum coherence and oscillation are critical for these applications. The ground-state quantum coherence and Rabi oscillations of the SMM V15 ([V15(IV)As6(III)O42(H2O)]6-) have been studied in this context. We have affirmatively measured at 2.4 K the Rabi quantum oscillations and coherence time T2 for the ground states of the V15 ion of collective spin S=1/2, in addition to confirming the previously reported results for the S=3/2 excited states. The oscillations of S=3/2 and S=1/2 states are of different frequencies, and so can be separately selected for purposive manipulations. T2 of 188±4  ns (S=3/2) and 149±10  ns (S=1/2) are much less than T1∼12  μs and are further extendible via various approaches for qubit implementations.
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Jiahui
authors.initials: J
authors.lastname: Yang
authors.forename: Ya
authors.initials: Y
authors.lastname: Wang
authors.forename: Zixiang
authors.initials: Z
authors.lastname: Wang
authors.forename: Xing
authors.initials: X
authors.lastname: Rong
authors.forename: Chang-Kui
authors.initials: CK
authors.lastname: Duan
authors.forename: Ji-Hu
authors.initials: JH
authors.lastname: Su
authors.forename: Jiangfeng
authors.initials: J
authors.lastname: Du