Fermion-mediated long-range interactions between bosons stored in an optical lattice

被引：20
作者：
De, S. [1 ]
Spielman, I. B. [2 ]
机构：
[1] CSIR Natl Phys Iaboratory, New Delhi 110012, India
[2] Univ Maryland, Joint Quantum Inst, Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2014年 / 114卷 / 04期
基金：
美国国家科学基金会;
关键词：
3-BODY RECOMBINATION; SCATTERING LENGTHS; ATOMS; SUPERFLUID; COLLISIONS; GASES;
D O I：
10.1007/s00340-013-5556-5
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We describe a new method for creating spin-dependent long-range interactions between atomic ultra-cold neutral bosons-specifically Rb-87-in an optical lattice. In this proposal, the bosonic system is immersed in a spin-polarized degenerate Fermi gas (almost perfectly non-interacting), here Li-6. We first show that the bosons acquire a long-range interaction analogous to Ruderman-Kittel-Kasuya-Yosida interaction in solids. The resulting fermion-mediated Bose-Bose interaction, which can depend on the bosons' spin state, is tunable using inter-species Feshbach resonance. When the bosons are subject to a suitable optical lattice, 3-body loss processes are greatly suppressed. We conclude by showing that these interactions can lead to a supersolid phase for single-spin Bose system, and also to a fully tunable transverse field Ising model for a two-component Bose system.
引用
收藏
页码：527 / 536
页数：10
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