Preparation and spectroscopy of a metastable Mott-insulator state with attractive interactions.
Preparation and spectroscopy of a metastable Mott-insulator state with attractive interactions.
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具有吸引相互作用的亚稳态莫特绝缘体态的制备和光谱学。
DOI：
10.1103/physrevlett.108.215302
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发表时间：
2012
影响因子：
8.6
通讯作者：
H. Nagerl
中科院分区：
文献类型：
--
作者：
M. Mark;E. Haller;K. Lauber;J. Danzl;Alexander Janisch;H. P. Buchler;A. Daley;H. Nagerl
我们制备并研究了三维光学晶格中玻色子原子形成的亚稳态吸引莫特绝缘体态。从一个莫特绝缘体与Cs原子在弱排斥相互作用，我们使用磁Feshbach共振调谐的相互作用，以大的吸引力的值，并产生一个亚稳态钉扎的吸引力相互作用与寿命的顺序为10秒。我们通过晶格调制光谱探测（去）激发光谱，测量两体和三体束缚态能量的相互作用依赖性。由于增加现场三体损失，我们观察到共振加宽和抑制隧穿过程，产生三体占领。
We prepare and study a metastable attractive Mott-insulator state formed with bosonic atoms in a three-dimensional optical lattice. Starting from a Mott insulator with Cs atoms at weak repulsive interactions, we use a magnetic Feshbach resonance to tune the interactions to large attractive values and produce a metastable state pinned by attractive interactions with a lifetime on the order of 10 s. We probe the (de)excitation spectrum via lattice modulation spectroscopy, measuring the interaction dependence of two- and three-body bound-state energies. As a result of increased on-site three-body loss we observe resonance broadening and suppression of tunneling processes that produce three-body occupation.