Quantum phases in an optical lattice with a staggered magnetic field

具有交错磁场的光学晶格中的量子相

• 批准号: 201737916
• 负责人: Professor Dr. Andreas Hemmerich
• 金额: --
• 依托单位: Institut für Laser-Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/201737916?language=en
• 关键词: Quantum; phases; optical; lattice; staggered

It is proposed to experimentally study ultracold atoms subjected to a time-modulated optical potential, which simulates the action of a staggered magnetic field upon charged particles confined in a rectangular quasi two-dimensional stationary lattice. At low densities this scenario allows to explore a new chiral quantum phase characterized by a vortex-antivortex lattice, which breaks time-reversal symmetry. In order to prevent deleterious heating from interband transitions and to reach the strongly correlated regime, the motion along one axis of the lattices is frozen out and a Feshbach resonance is used to independently tune the interaction while maintaining a suitable size of the hopping parameters. This will permit us to map out the phase boundaries between various superfluid quantum phases and a Mott insulator.

建议通过实验研究受时间调制光势影响的超冷原子，该光势模拟交错磁场对限制在矩形准二维静止晶格中的带电粒子的作用。在低密度下，这种情况允许探索一种新的手性量子相，其特征是涡旋-反涡晶格，它打破了时间反转对称性。 In order to prevent deleterious heating from interband transitions and to reach the strongly correlated regime, the motion along one axis of the lattices is frozen out and a Feshbach resonance is used to independently tune the interaction while maintaining a suitable size of the hopping parameters.这将使我们能够绘制出各种超流体量子相和莫特绝缘体之间的相边界。

项目成果

Topologically induced avoided band crossing in an optical checkerboard lattice.

• DOI: 10.1103/physrevlett.108.075302
• 发表时间: 2011-10
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: Matthias Olschläger;G. Wirth;T. Kock;A. Hemmerich