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

超短光脉冲是实现对量子材料电子性质的全光操纵的有力工具，其时间尺度快于100ps。我们提出了一个新的国际合作来探索铜酸盐超导体的光致特性的研究，铜酸盐超导体是一类基于铜和氧的重要的量子材料，在根本上和技术上都很重要。为了了解这些超导体对超快激光脉冲的电子响应，我们提出了一项关于铜酸盐材料Bi2Sr2CaCu2O8+d中光诱导动力学的实验和理论研究相结合的研究。位于达马塞利实验室的一个主要的量子材料动态电子性质的实验探测器，被称为“时间和角度分辨光电子能谱”，将是拟议合作工作的重点。当代的理论方法对于指导实验和解释用这种新仪器得出的数据至关重要。这项应用将使我们能够与美国波士顿东北大学的国际公认的凝聚态理论家禤浩焯费根进行首次合作。Feiguin提出用一种先进的理论方法，即含时密度矩阵重整化群来描述超快光脉冲激发后CuCu3+中超导电性的时间演化。拟议中的合作预计将导致更长期的研究、高影响力的出版物以及知识和专业知识的交流，这将使两个小组在下一代量子材料研究方面成为世界领先者。这些材料的新特性对UBC和加拿大具有战略重要性，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，这是不断增长的量子科学与技术领域的高需求。

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.