Bound states and universality in layers of cold polar molecules

被引：46

作者：

Armstrong, J. R. ^{[1
]}

Zinner, N. T. ^{[1
,2
]}

Fedorov, D. V. ^{[1
]}

Jensen, A. S. ^{[1
]}

机构：

[1] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[2] Niels Bohr Inst, DK-2100 Copenhagen O, Denmark

来源：

EPL | 2010年 / 91卷 / 01期

关键词：

PHASE; GAS;

D O I：

10.1209/0295-5075/91/16001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The recent experimental realization of cold polar molecules in the rotational and vibrational ground state opens the door to the study of a wealth of phenomena involving long-range interactions. By applying an optical lattice to a gas of cold polar molecules one can create a layered system of planar traps. Due to the long-range dipole-dipole interaction one expects a rich structure of bound complexes in this geometry. We study the bilayer case and determine the two-body bound-state properties as a function of the interaction strength. The results clearly show that a least one bound state will always be present in the system. In addition, bound states at zero energy show universal behavior and extend to very large radii. These results suggest that non-trivial bound complexes of more than two particles are likely in the bilayer and in more complicated chain structures in multilayer systems. Copyright (C) EPLA, 2010

引用

页数：6

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