Time-resolved study of photoinduced dynamics of the cuprate superconducting gap

超短光脉冲作为一种强有力的工具正在兴起，用于在时间尺度上实现量子材料中电子性质的全光学操纵，其速度超过100 fs。我们提出了一个新的国际合作，以探索铜酸盐超导体的光致特性的研究，这是一个基于铜和氧的量子材料的基本和技术重要家族。为了了解这些超导体的电子响应超快激光脉冲，我们提出了一个结合实验和理论研究的光诱导动力学的铜酸盐材料Bi2Sr2CaCu2O8+d。位于Damascelli实验室的量子材料动态电子特性的首要实验探测器，称为“时间和角度分辨光电子能谱”，将是拟议合作工作的重点。当代的理论方法是至关重要的，以指导实验和解释所产生的数据与这种新的仪器。该应用程序将首次与美国波士顿东北大学的国际公认的凝聚态理论家Adrian Feiguin合作。Feiguin提出采用一种称为时间相关密度矩阵重整化群的先进理论方法来描述超快光脉冲激发后铜氧化物超导性的时间演化。预计拟议的合作将导致长期研究，高影响力的出版物以及知识和专业知识的交流，这将使两个小组成为下一代量子材料研究的世界领导者。这些材料的新特性对UBC和加拿大具有重要的战略意义，并可能导致从先进制造到量子计算，密码学和信息等领域的重大突破。这项工作还将有助于培训新兴的量子劳动力，这对不断增长的量子科学和技术领域有很高的需求。

Ultrashort light pulses are emerging as a powerful tool for achieving the all-optical manipulation of electronic properties in quantum materials on time scales faster than 100 fs. We propose a new international collaboration to explore the study of the light-induced properties in cuprate superconductors, a fundamentally and technologically important family of quantum materials based on copper and oxygen. To understand the electronic response of these superconductors to ultrafast laser light pulses, we propose a combined experimental and theoretical investigation of light-induced dynamics in the cuprate material Bi2Sr2CaCu2O8+d. A premier experimental probe of dynamical electronic properties in quantum materials located in the Damascelli lab, known as 'time- and angle-resolved photoemission spectroscopy', will be the focus of the proposed collaborative work. Contemporary theoretical methods are crucial to guide experimentation and interpretation of the resulting data with this new instrument. This application will enable a first-time collaboration with internationally recognized condensed matter theorist Adrian Feiguin at Northeastern University in Boston, USA. Feiguin proposes to employ an advanced theoretical method known as time-dependent density matrix renormalization group to describe the time evolution of superconductivity in the cuprates following excitation with an ultrafast light pulse. The proposed collaboration is expected to lead to longer-term studies, high-impact publications, and an exchange of knowledge and expertise, which will position both groups to be world leaders in the next generation of quantum materials' research. The novel properties of these materials are of strategic importance to UBC and Canada and could lead to major breakthroughs in areas ranging from advanced manufacturing to quantum computing, cryptography, and information. The work will also contribute to the training of an emerging quantum workforce, which is in high demand for the growing field of quantum science & technology.