Simulation of Multi-Component Fermionic Quantum Matter Using Oxide Nanoelectronics

使用氧化物纳米电子学模拟多组分费米子量子物质

• 批准号: 1913034
• 负责人: Jeremy Levy
• 金额: $ 64.87万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1913034&HistoricalAwards=false
• 关键词: Simulation; Multi; Component; Fermionic; Quantum

The project is aimed at the construction of a new kind of quantum simulator, an analogue quantum computer, in which tunable interactions between electrons will be used to simulate dense nuclear matter and probe its quantum properties. Neutrons and protons, the building blocks of atomic nuclei, consist of bound states of elementary particles called quarks. The neutron is made up of an "up" quark and two "down" quarks, while the proton of two "up" quarks and a "down" quark. When large stars burn out, they tend to explode in supernovae. The fate of their remains depends on the size of the original stars. Remains of large stars tend to collapse into super-dense objects called neutron stars, very large stars are believed to collapse into even denser objects called "quark" stars, and the super-large stars collapse into black holes. To give a sense of scale, neutron stars typically have a radius on the order of only 10 kilometers but a mass of 10-30 suns. It is hypothesized that neutron stars consist of a soup of neutrons in a superfluid state; the quantum degeneracy pressure of the neutrons balances the huge gravitational forces preventing neutron stars from collapsing further. For very large stars, the gravitational forces smash the neutrons into their constituent quarks, and it is the quantum degeneracy pressure of quarks that prevents quark stars from collapsing. However, the properties of dense nuclear matter, like that found in neutron and quark stars, are largely unknown. This project will attempt to uncover some of these mysteries by simulating dense nuclear matter with a solid-state system. Understanding multi-component fermionic systems is a cross-cutting area of inquiry with implications in nuclear physics, physics of neutron stars, as well as more conventional condensed matter systems. In the past, the research team has demonstrated that the interface between two complex oxides LaAlO3 and SrTiO3 has a number of interesting properties: (a) the electron density at the interface is reconfigurable by STM lithography, (b) electron-electron interactions can be tuned by controlling the electron density, and (c) it is possible to form bound states of two and three electrons. In the next step, the researchers will combine these properties in order to build a reconfigurable quantum simulator for multi-fermion bound states. Proficiency in this class of problems would be a milestone in the development of a more general "universal" quantum simulator that can broadly contribute to understanding of the nature of quantum matter and developing novel quantum materials. The project is jointly supported by the Quantum Information Science Program in the Physics Division and by the Condensed Matter Physics Program in the Division of Materials Research.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目旨在构建一种新型的量子模拟器，一种模拟量子计算机，其中将使用电子之间的可调相互作用来模拟密集的核物质并探测其量子性能。中子和质子，原子核的构件，由称为夸克的基本颗粒的结合状态。中子由“上”夸克和两个“向下”夸克组成，而两个“上”夸克和一个“ down”夸克的质子。当大星星燃烧时，它们倾向于在超新星中爆炸。他们遗体的命运取决于原始恒星的大小。大恒星的遗迹倾向于塌陷成一个称为中子星的超密集物体，据信非常大的恒星甚至倒入称为“夸克”恒星的较密集的物体，超大恒星倒入黑洞。为了给人一种规模的感觉，中子恒星通常只有10公里的速度，而质量为10-30个太阳。假设中子恒星由以超流体状态的中子汤组成。中子的量子变性压力平衡了巨大的重力阻止中子恒星进一步崩溃。对于非常大的恒星，重力将中子粉碎到其组成夸克中，正是夸克的量子退化压力阻止了夸克恒星崩溃。但是，像中子和夸克恒星中发现的密集核物质的特性在很大程度上是未知的。该项目将试图通过使用固态系统模拟密集的核物质来揭示其中的一些谜团。了解多组分的费米子系统是一个跨切割领域，对核物理学，中子恒星的物理学以及更常规的冷凝物质系统具有影响。过去，研究小组表明，两个复杂的氧化物LAALO3和SRTIO3之间具有许多有趣的属性：（a）界面处的电子密度可通过STM刻板图重新配置，（b）可以通过控制电子密度和三个形式的电子和三个界限来调整电子电子相互作用。在下一步中，研究人员将结合这些属性，以构建可为多屈光度绑定状态的可重构量子模拟器。在这类问题上的熟练程度将是开发更通用的“通用”量子模拟器的里程碑，该量子模拟器可以广泛地理解量子物质的性质和开发新颖的量子材料。该项目由物理部的量子信息科学计划共同支持，并由材料研究部的凝聚态物理学计划共同支持。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的智力优点和更广泛影响的评估来评估的审查标准。

项目成果

Preparing students to be leaders of the quantum information revolution

培养学生成为量子信息革命的领导者

• DOI: 10.1063/pt.6.5.20210927a
• 发表时间: 2021
• 期刊: Physics Today
• 影响因子: 3.5
• 作者: Chandralekha Singh;Abraham Asfaw;Jeremy Levy
• 通讯作者: Jeremy Levy

Spin-orbit-assisted electron pairing in one-dimensional waveguides

一维波导中的自旋轨道辅助电子配对

• DOI: 10.1103/physrevb.104.125103
• 发表时间: 2021
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Damanet, François;Mansfield, Elliott;Briggeman, Megan;Irvin, Patrick;Levy, Jeremy;Daley, Andrew J.
• 通讯作者: Daley, Andrew J.

Longitudinal and transverse frictional drag in graphene/ LaAlO3/SrTiO3 heterostructures

石墨烯/LaAlO3/SrTiO3异质结构中的纵向和横向摩擦阻力

• DOI: 10.1103/physrevb.106.045303
• 发表时间: 2022
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Guo, Qing;Li, Jianan;Lee, Hyungwoo;Lee, Jung-Woo;Tang, Yuhe;Yu, Muqing;Hu, Yang;Eom, Chang-Beom;Irvin, Patrick;Levy, Jeremy
• 通讯作者: Levy, Jeremy

One-dimensional repulsive Hubbard model with mass imbalance: Orders and filling anomaly

具有质量不平衡的一维排斥哈伯德模型：订单和填充异常

• DOI: 10.1103/physrevb.104.195126
• 发表时间: 2021
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: He, Yuchi;Pekker, David;Mong, Roger S.
• 通讯作者: Mong, Roger S.