Hyperfine structure in the microwave spectra of ultracold polar molecules

Hyperfine structure in the microwave spectra of ultracold polar molecules
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超冷极性分子微波光谱中的超精细结构

DOI:
10.1088/1367-2630/12/4/043015
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发表时间:
2010
影响因子:
3.3
通讯作者:
Ran H
Ran H
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Ran H

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我们研究了超冷碱金属二聚体在磁场、电场和组合场中的微波光谱,考虑到核自旋导致的超精细结构。我们考虑了当前实验的目标分子 41 K 87 Rb 和 7 Li 133 Cs,并证明了大核四极耦合和小核四极耦合的两个极端。我们计算了跃迁的频率和强度,这些跃迁可用于利用不同偏振的微波辐射在磁场中的超精细状态之间转移超冷分子。在电场中,超精细能级在特定场上显示出狭窄的避免交叉,我们用分子排列来解释这一点。电场中出现的超精细分裂可能会阻碍在量子计算中使用超冷分子的方案中的单独寻址,但光谱的结构在组合场中受到抑制。
We investigate the microwave spectra of ultracold alkali metal dimers in magnetic, electric and combined fields taking into account the hyperfine structure due to nuclear spins. We consider the molecules 41 K 87 Rb and 7 Li 133 Cs, which are the targets of current experiments, and demonstrate two extremes of large and small nuclear quadrupole couplings. We calculate the frequencies and intensities of transitions that may be used to transfer ultracold molecules between hyperfine states in a magnetic field, employing different polarizations of microwave radiation. In an electric field, the hyperfine levels display narrow avoided crossings at specific fields that we explain in terms of molecular alignment. The hyperfine splittings that arise in electric fields may hinder individual addressing in schemes that use ultracold molecules in quantum computation, but the structure of the spectra is suppressed in combined fields.
DOI: 10.1038/nphys1533
发表时间: 2010-04-01
期刊: NATURE PHYSICS
影响因子: 19.6
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