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

超短光脉冲正在成为一种强大的工具，可以在超过100秒的时间尺度上实现量子材料电子特性的全光操纵。我们提出了一项新的国际合作，以探索铜超导体的光诱导特性的研究，铜超导体是基于铜和氧的量子材料的一个基本和技术上重要的家族。为了了解这些超导体对超快激光脉冲的电子响应，我们提出了一种结合实验和理论的方法来研究铜材料Bi2Sr2CaCu2O8+d的光诱导动力学。位于大马士革实验室的量子材料动态电子特性的首要实验探针，被称为“时间和角度分辨光发射光谱”，将是拟议合作工作的重点。当代的理论方法是至关重要的指导实验和解释的结果数据与这一新的仪器。这个应用程序将使国际公认的凝聚态理论家Adrian Feiguin在美国波士顿东北大学的首次合作成为可能。Feiguin提出了一种先进的理论方法，即时间相关密度矩阵重整化群，来描述超快光脉冲激发后铜酸盐中超导性的时间演化。拟议的合作预计将导致长期研究，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和加拿大具有战略意义，并可能在从先进制造到量子计算、密码学和信息等领域取得重大突破。这项工作还将有助于培养新兴的量子劳动力，这对不断发展的量子科学与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.