A general quantum algorithm for simulating open quantum dynamics

演讲人: Zixuan Hu Purdue University
时间: 2022-08-17 20:00-2022-08-17 21:00
地点:MMW S727 + Tencent Meeting (ID: 419-413-213, password: 1984)

Open quantum dynamics describes the time evolution of a system interacting with an environment and has important applications in physical chemistry, materials science, applied physics, etc. Despite its importance, there are relatively few developments of quantum algorithms for simulating open quantum dynamics, and a main challenge is to design a general quantum algorithm for physical models beyond the 2-level system and Markovian systems. To this end, we present such a general quantum algorithm based on the mathematical theory of unitary dilation. Initially demonstrated with a 2-level Markovian system (Scientific Reports, 10, 3301, (2020)), this algorithm was then applied to a non-Markovian system (Physical Review Research 3, 013182, (2021)) – both simulations were implemented on the IBM quantum computers. Recently, this quantum algorithm was generalized to simulating the dynamics of the Fenna-Matthews-Olson (FMO) complex on the IBM quantum simulator (Quantum 6, 726, (2022)), which is so far as we know the first successful application of a quantum algorithm on such a complex biological system. We discuss the complexity of the quantum algorithm relative to the classical method for the same purpose, presenting a decisive query complexity advantage of the quantum approach based on the unique property of quantum measurement.


2016-2022: Postdoctoral researcher (博士后), Purdue University (普渡大学), advisor (导师): Prof. Sabre Kais.
2015-2016: Postdoctoral researcher (博士后), University of California at San Diego (加州大学圣迭戈分校), advisor (导师): Prof. Joel Yuen-Zhou.
2013-2015: Postdoctoral researcher (博士后), Northwestern University (西北大学), advisors (导师): Prof. Mark A. Ratner and Prof. Tamar Seideman.
2013: Ph.D. in Theoretical Chemistry (理论化学博士学位)
2007-2013: graduate student (博士生), Northwestern University (西北大学), advisors (导师): Prof. Mark A. Ratner and Prof. Tamar Seideman. 
2007: B.Sc. in Chemistry (major) and Mathematics (minor) (理学士: 化学主修/数学辅修).
2004-2007: undergraduate student (本科生), University of Hong Kong (香港大学).