Disordered Ultracold Atomic Systems

无序超冷原子系统

• 批准号: 1068388
• 负责人: Steven Rolston
• 金额: $ 45万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1068388&HistoricalAwards=false
• 关键词: Disordered; Ultracold; Atomic; Systems

This research will explore the physics related to disorder in condensed matter systems by using ultracold atomic systems as models. Disorder is ubiquitous in real-world materials and often is critical in determining material performance and properties. Understanding the physics of disorder is therefore important to the development of new materials and understanding existing ones. Yet it is challenging because many of the tools of condensed matter physics rely on the periodicity of the underlying lattice structure, which is not the case for disorder. As a result, many systems that have well developed physical models and solutions become insoluble with disorder present. This work will explore a number of disordered physics issues using model ultracold atom systems using Bose-Einstein condensates. Researchers will investigate disordered two-dimensional systems, which are relevant to many solid-state systems including high Tc superconductors. Using incommensurate optical lattices, research will be carried out exploring the process of quantum annealing and adiabatic quantum computing. These topics rely on a system remaining in the lowest energy state even as the system is evolved, which can become hard to satisfy if there are closely spaced energy levels, almost always the case in the presence of disorder.This work resides at the intersection of atomic physics, quantum information science, and condensed matter physics. Disorder appears in almost all practical materials, so any further understanding of the physics of disorder will potentially contribute to the development of new materials. The ability to know the system exactly and to have good control over system parameters may allow for more insight into disordered systems than is achievable in solid-state systems. Quantum annealing and adiabatic quantum computation are important in the overall development of our ideas about the power of quantum information processing and in general the added utility that a quantum system may have over a classical one. This work will train postdocs, graduate and undergraduate students to be the next generation of highly skilled workers in the new area of quantum information science and technology.

本研究将以超冷原子系统为模型，探讨凝聚态系统中与无序相关的物理现象。无序在现实世界的材料中普遍存在，并且通常在决定材料性能和性质方面至关重要。因此，理解无序的物理学对于开发新材料和理解现有材料非常重要。然而，这是具有挑战性的，因为凝聚态物理学的许多工具都依赖于底层晶格结构的周期性，而无序的情况并非如此。 因此，许多具有良好物理模型和解决方案的系统变得无法解决，存在无序。这项工作将探讨一些无序的物理问题，使用模型超冷原子系统使用玻色-爱因斯坦凝聚。研究人员将研究无序的二维系统，这与包括高温超导体在内的许多固态系统有关。利用无公度光学晶格，将进行探索量子退火和绝热量子计算过程的研究。 这些课题依赖于系统在演化过程中保持最低能量状态，如果能级间隔很近，就很难满足这一点，在无序的情况下几乎总是如此。这项工作位于原子物理学、量子信息科学和凝聚态物理学的交叉点。无序几乎出现在所有的实际材料中，因此对无序物理学的任何进一步理解都可能有助于新材料的开发。准确地知道系统和对系统参数具有良好控制的能力可以允许比在固态系统中可实现的更深入地了解无序系统。量子退火和绝热量子计算在我们关于量子信息处理能力的整体发展中非常重要，一般来说，量子系统可能比经典系统具有更多的实用性。 这项工作将培养博士后，研究生和本科生成为量子信息科学和技术新领域的下一代高技能工人。