Tomorrow we have two master students finishing up, Julian Schuhmacher, who was at IBM with Ivano Tavernelli, and Yanglin Hu, who was working with Mischa. See below for their titles and abstracts. We'll start at 2pm on zoom: https://ethz.zoom.us/j/362994444

Best,

Joe

Speaker: Julian Schuhmacher

Title: Towards large scale simulations with quantum computers and machine learning potentials

Abstract:The simulation of materials with molecular dynamics (MD) simulations is an important tool to understand and predict the properties of materials. Historically, accurate MD simulations were driven by computationally costly, yet still approximated, first-principles electronic structures calculations like Density Functional Theory (DFT), and therefore were limited to small system sizes and short simulation times. In the last few years, the application of machine learning potentials, trained on DFT or post-Hartree Fock data, allowed to run MD simulations at the accuracy of ab initio methods, but at a fraction of the computational cost. 

Speaker: Yanglin Hu

Title: Feasibility of Experimental Realizations of Quantum Effects in Gravitational Time Dilation

Abstract: A potentially detectable quantum discrepancy to time dilation in delocalized clocks was derived previously. However, no experiment was put forward to experimentally test it. In this work, we investigate the possibility to conduct a real experiment. The expectation value and the variance of the quantum discrepancy are derived with the Lindblad equation and second-order perturbation theory. Two experimental protocols based on Strontium and Magnesium optical lattice clocks are proposed. Numerical results show that it would be possible to detect the quantum discrepancy with next-generation Magnesium optical lattice clocks. We also investigate the effect of decoherence mechanisms on clock's accuracy. Upper bounds on decoherence rates in order to detect the quantum discrepancy are also given.