分子量子气体基态转移的精密分子光谱学
Precision molecular spectroscopy for ground state transfer of molecular quantum gases
摘要：
在振转基态中产生分子的超冷、高相空间密度量子气体的一种可能性依赖于首先将来自量子简并原子气体的弱束缚分子在费什巴赫共振上缔合，然后通过相干双光子受激拉曼绝热通道（STIRAP）的几个步骤将分子转移到振转基态中。在由Cs原子的超冷样品产生的Cs_2 Feshbach分子的超冷样品中，我们以高分辨率观察到了几个到激发态0_u^+分子势的深束缚振转能级的光学跃迁。这些跃迁中至少有一个虽然相当弱，但允许有效的STIRAP转移到深度束缚的振动能级|v=73>的单重态X ^1 Sigma_g ^+基态势，正如最近证明的那样。从这个能级出发，振转基态能级|v=0，J=0>可以通过再一个转移步骤来达到。总之，我们的结果表明，相干基态转移的Cs_2是可能的，使用最多的两个连续的双光子过程或一个单一的四光子STIRAP过程。
英文摘要：
One possibility for the creation of ultracold, high-phase-space-density quantum gases of molecules in the rovibrational ground state relies on first associating weakly-bound molecules from quantum-degenerate atomic gases on a Feshbach resonance and then transfering the molecules via several steps of coherent two-photon stimulated Raman adiabatic passage (STIRAP) into the rovibronic ground state. Here, in ultracold samples of Cs_2 Feshbach molecules produced out of ultracold samples of Cs atoms, we observe several optical transitions to deeply bound rovibrational levels of the excited 0_u^+ molecular potentials with high resolution. At least one of these transitions, although rather weak, allows efficient STIRAP transfer into the deeply bound vibrational level |v=73> of the singlet X ^1Sigma_g^+ ground state potential, as recently demonstrated. From this level, the rovibrational ground state level |v=0, J=0> can be reached with one more transfer step. In total, our results show that coherent ground state transfer for Cs_2 is possible using a maximum of two successive two-photon processes or one single four-photon STIRAP process.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
