Overcoming exponential walls in quantum many-body systems (Aug. 15, 2022)

  • Published: 2022-08-07

Time: August 15, 2022, 10:00 am

Place: Room 401, No. 7 Building, Zhongguancun campus


Speaker: Rubem Mondaini (Beijing Computational Science Research Center)


In this talk I plan to provide an overview of how limitations inherent to interacting quantum systems present as a roadblock to their  study in classical computers. Nonetheless, ingenious methods can be used such that useful information can yet be obtained in the face of these impediments. In particular, I will discuss the emergence of the sign problem in quantum Monte Carlo simulations, and argue that besides being a mere nuisance, one can use it as a tool to investigate quantum criticality. Furthermore, I will show that using metrics associated to the Monte Carlo sampling, including the mean distance traveled in the hyper-dimensional space of configurations, constitute as powerful means to diagnostic the onset of ordered behavior.