【时  间】30-May-2024（Thursday）2:30pm (Beijing time)

【地  点】量子院 320会议室

【主  持】Shijie Wei   BAQIS

【题  目】Learning universal ansatze for quantum many-body systems for quantum devices

【摘  要】In simulating quantum systems with quantum hardware, a key challenge lies in efficiently preparing quantum many-body states which typically span over exponentially large Hilbert spaces. This computational burden can be addressed by employing educated ansatze that significantly reduce the complexity of the quantum states while retaining their essential structural features. However, despite the need to engineer powerful wave-function ansatze across nearly all domains of quantum physics, no universal framework has emerged so far for efficiently ansatzing the wave functions of quantum many-body systems. In this talk, I will present a universal methodology to produce exact ansatze for the eigenstate problem of quantum many-body systems that can be implemented on quantum devices. Our approach is based on a generalization of the electronic contracted Schrodinger equation, which uniquely allows the ansatz to have the same degrees of freedom as the original quantum many-body Hamiltonian. Leveraging this property, we design a procedure to learn the degrees of freedom of the ansatz using neural networks.

【报告人简介】Carlos Benavides-Riveros is a Marie-Curie fellow at the University of Trento (Italy) and research fellow of the Italian National Institute of Optics. His research is focused on enhancing the scope of functional theories to quantum many-body systems, including condensates and superconductors. He is also interested in developing quantum and machine learning algorithms for electronic structure theory. Dr. Benavides-Riveros did his PhD at the University of Zaragoza (Spain), where he won the extraordinary PhD Thesis award 2015-2016, and a postdoc with Prof. Miguel Marques at the University of Halle-Wittenberg, Germany (2016-2020). Before winning a prestigious Marie-Curie fellowship, he got a Next-Step fellowship at the Max-Planck Institute for Complex Systems in Dresden, Germany (2020-2022). He has coauthored 37 papers (including 2 PRL). Since 2022 he is member of the Royal Society of Chemistry (MRSC).