Will Sebastian A, Park Jee Woo, Yan Zoe Z, Loh Huanqian, Zwierlein Martin W
MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Center for Quantum Technologies, National University of Singapore, 3 Science Drive 2, 117543, Singapore.
Phys Rev Lett. 2016 Jun 3;116(22):225306. doi: 10.1103/PhysRevLett.116.225306.
We demonstrate coherent microwave control of rotational and hyperfine states of trapped, ultracold, and chemically stable ^{23}Na^{40}K molecules. Starting with all molecules in the absolute rovibrational and hyperfine ground state, we study rotational transitions in combined magnetic and electric fields and explain the rich hyperfine structure. Following the transfer of the entire molecular ensemble into a single hyperfine level of the first rotationally excited state, J=1, we observe lifetimes of more than 3 s, comparable to those in the rovibrational ground state, J=0. Long-lived ensembles and full quantum state control are prerequisites for the use of ultracold molecules in quantum simulation, precision measurements, and quantum information processing.
我们展示了对捕获的超冷且化学性质稳定的(^{23}Na^{40}K)分子的转动和超精细态的相干微波控制。从所有分子处于绝对振转和超精细基态开始，我们研究了组合磁场和电场中的转动跃迁，并解释了丰富的超精细结构。在将整个分子系综转移到第一转动激发态(J = 1)的单个超精细能级后，我们观察到寿命超过(3)秒，这与振转基态(J = 0)时的寿命相当。长寿命系综和全量子态控制是在量子模拟、精密测量和量子信息处理中使用超冷分子的先决条件。
