介观体系中偶极分子的多体动力学。

Many-body dynamics of dipolar molecules in an optical lattice.

机构信息

JILA, National Institute of Standards and Technology and University of Colorado, Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA.

Joint Quantum Institute, National Institute of Standards and Technology, and University of Maryland, Gaithersburg, Maryland 20899, USA.

出版信息

Phys Rev Lett. 2014 Nov 7;113(19):195302. doi: 10.1103/PhysRevLett.113.195302.

DOI:10.1103/PhysRevLett.113.195302

PMID:25415911

Abstract

We use Ramsey spectroscopy to experimentally probe the quantum dynamics of disordered dipolar-interacting ultracold molecules in a partially filled optical lattice, and we compare the results to theory. We report the capability to control the dipolar interaction strength. We find excellent agreement between our measurements of the spin dynamics and theoretical calculations with no fitting parameters, including the dynamics' dependence on molecule number and on the dipolar interaction strength. This agreement verifies the microscopic model expected to govern the dynamics of dipolar molecules, even in this strongly correlated beyond-mean-field regime, and represents the first step towards using this system to explore many-body dynamics in regimes that are inaccessible to current theoretical techniques.

摘要

我们使用 Ramsey 光谱法实验探测了部分填充光晶格中无序偶极相互作用的超冷分子的量子动力学，并将结果与理论进行了比较。我们报告了控制偶极力的能力。我们发现，我们对自旋动力学的测量结果与没有拟合参数的理论计算非常吻合，包括分子数和偶极力对动力学的依赖性。这种一致性验证了预计控制偶极分子动力学的微观模型，即使在这个强关联的超越平均场的范围内，这也是朝着使用这个系统来探索当前理论技术无法达到的多体动力学的第一步。