Studies of Impurity-Atom Dynamics in Lattice-Modulated Bosonic Mixtures

晶格调制玻色子混合物中的杂质原子动力学研究

• 批准号: 1205894
• 负责人: Dominik Schneble
• 金额: $ 44.7万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-15 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1205894&HistoricalAwards=false
• 关键词: Studies; Impurity; Atom; Dynamics; Lattice

The coupling of a particle to its surroundings enables important condensed-matter phenomena such as the formation of polarons in solid-state and low-temperature systems, and is a central concept in the study of decoherence and dissipation. This project focuses on the experimental study of such coupled systems using mixtures of ultracold bosonic atoms trapped in an optical lattice. Using a hyperfine-ground state mixture of bosonic atoms in state-dependent optical lattices allows for the immersion of localized atoms in a bosonic background medium. One of the goals of the projectis to detect polaronic energy shifts and clustering spectroscopically in the limit of strong interactions. Another goal is to study the dynamics of a localized, driven atomic spin coupled to a bosonic superfluid as a simple realization of a spin-boson model for the study of quantum dissipative effects. Using state-dependent potentials as a manipulation tool, a third goal is to study out-of-equilibrium dynamics of one-dimensional spin mixtures with the possibility of observing spin-charge separation. The elucidation of behavior specific to complex materials will have the potential for broad scientific and technological impact that can ultimately benefit society. The project will advance the state of the art of quantum-gas research in this direction, and it will also provide scientific and technical training to both graduate and undergraduate students who will gain proficiency in the enabling technologies of lasers and optics, ultrahigh vacuum, and electronics.

粒子与周围环境的耦合可以使重要的凝结物现象，例如固态和低温系统中极地的形成，并且是对破坏和耗散研究的核心概念。该项目的重点是使用被困在光学晶格中的超电骨原子的混合物对此类耦合系统的实验研究。使用在状态依赖性光学晶格中的骨气原子的超精细地面状态混合物，可以将局部原子浸入玻色粒背景培养基中。项目的目标之一是在强相互作用的极限下从光谱上检测偏光型能量转移和聚类。另一个目标是研究局部驱动的原子自旋的动力学，该动力学结合到玻色子超流体，以简单地实现自旋 - 玻色子模型，以研究量子耗散效应。将依赖性电位作为操纵工具，第三个目标是研究一维自旋混合物的不平衡动力学，并可能观察到自旋荷利分离。阐明特定于复杂材料的行为将有可能产生广泛的科学和技术影响，最终可以使社会受益。该项目将朝这个方向推进量子气体研究的现状，并且还将为研究生和本科生提供科学和技术培训，他们将熟练掌握激光器和光学技术，超大型真空和电子产品的能力。