Cairncross William B, Zhang Jessie T, Picard Lewis R B, Yu Yichao, Wang Kenneth, Ni Kang-Kuen
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
Phys Rev Lett. 2021 Mar 26;126(12):123402. doi: 10.1103/PhysRevLett.126.123402.
We demonstrate the coherent creation of a single NaCs molecule in its rotational, vibrational, and electronic (rovibronic) ground state in an optical tweezer. Starting with a weakly bound Feshbach molecule, we locate a two-photon transition via the |c^{3}Σ_{1},v^{'}=26⟩ excited state and drive coherent Rabi oscillations between the Feshbach state and a single hyperfine level of the NaCs rovibronic ground state |X^{1}Σ,v^{''}=0,N^{''}=0⟩ with a binding energy of D_{0}=h×147044.63(11) GHz. We measure a lifetime of 3.4±1.6 s for the rovibronic ground state molecule, which possesses a large molecule-frame dipole moment of 4.6D and occupies predominantly the motional ground state. These long-lived, fully quantum-state-controlled individual dipolar molecules provide a key resource for molecule-based quantum simulation and information processing.
我们展示了在光镊中，单个钠铯（NaCs）分子的转动、振动和电子（振转电子）基态的相干制备。从一个弱束缚的费什巴赫分子开始，我们通过|c³Σ₁, v' = 26⟩激发态找到一个双光子跃迁，并驱动费什巴赫态与钠铯振转电子基态|X¹Σ, v'' = 0, N'' = 0⟩的单个超精细能级之间的相干拉比振荡，其结合能为D₀ = h×147044.63(11) GHz。我们测量到振转电子基态分子的寿命为3.4±1.6 s，该分子具有4.6 D的大分子框架偶极矩，并且主要占据运动基态。这些长寿命、完全量子态可控的单个偶极分子为基于分子的量子模拟和信息处理提供了关键资源。
