主讲人：丁大威

时间：3月30日（周日）19:30

地点：宁斋

直播：校内【荷塘雨课堂】

校外b站【THU求真书院】

主讲人介绍

Dawei (David) Ding is an assistant professor at the Yau Mathematical Sciences Center at Tsinghua University. He obtained his PhD from Stanford University, where he made contributions to feedback-assisted communication over quantum channels and quantum chaos. He then worked as a quantum scientist at Alibaba Quantum Laboratory. His research focuses on how to use quantum entanglement to carry out superluminal coordination tasks. Another direction he is interested in is understanding the low-level physics of quantum computing devices and determining how to best use them for computational tasks, thereby taking a bottom-up approach to quantum computing.

讲座摘要

Quantum telepathy is the phenomenon where two non-communicating parties can exhibit correlated behaviors that are impossible to achieve using classical mechanics. This is also known as Bell inequality violation and is made possible by quantum entanglement. In this talk, we will explain this phenomenon from first principles and then present a conceptual framework for applying quantum telepathy to real-world problems. In general, the problems involve coordinating decisions given a set of observations without being able to communicate. We argue this inability is actually quite prevalent in the modern era where the decision-making timescales of computer processors are so short that the speed of light delay is actually quite appreciable in comparison. We highlight the example of high-frequency trading (HFT), where trades are made at microsecond timescales, but the speed of light delay between different exchanges can range from the order of 100 microseconds to 10 milliseconds. Due to the maturity of Bell inequality violation experiments, experimental realization of quantum telepathy schemes that can attain a quantum advantage for real-world problems is already almost immediately possible. We demonstrate this by conducting a case study for a concrete HFT scenario that gives rise to a generalization of the CHSH game and evaluate different possible physical implementations for achieving a quantum advantage. It is well known that Bell inequality violation is a rigorous mathematical proof of a quantum advantage over any classical strategy. This, along with its feasible experimental implementation, makes quantum telepathy a promising candidate for a near-term application of quantum technologies.