BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Masazumi Honda (Kyoto University) DTSTART:20220520T010000Z DTEND:20220520T020000Z DTSTAMP:20260423T041159Z UID:NMTP2022/15 DESCRIPTION:Title: Digital quantum simulation of higher-charge Schwinger model with topolog ical term\nby Masazumi Honda (Kyoto University) as part of Numerical M ethods in Theoretical Physics\n\n\nAbstract\nI am going to talk about appl ication of quantum computation to numerical simulation of quantum field th eory. Specifically we implement a digital quantum simulation of a gauge t heory with a topological term in Minkowski spacetime\, which is practicall y inaccessible by standard lattice Monte Carlo simulations. We focus on 1+ 1 dimensional quantum electrodynamics with a topological term and a charge -q Dirac fermion known as the Schwinger model. We construct the true vacuu m state of a lattice Schwinger model using adiabatic state preparation whi ch\, in turn\, allows us to compute an expectation value of the fermion ma ss operator with respect to the vacuum. \nUpon taking a continuum limit we find that our result in massless case agrees with the known exact result. In massive case\, we find an agreement with mass perturbation theory in s mall mass regime and deviations in large mass regime. $\\\\$\nWe also stud y a potential between heavy charged particles and see that the potential c hanges its qualitative behavior as changing parameters: it shows confineme nt\, screening and an exotic behavior called negative tension behavior in which particles with opposite charges repel with each other.\n\nRefs:$\\\\ $\n[1] B.Chakraborty\, M. Honda\, T. Izubuchi\, Y. Kikuchi and A. Tomiya\ , arXiv:2001.00485 $\\\\$\n[2] M. Honda\, E. Itou\, Y. Kikuchi\, L. Nagan o and T. Okuda\, arXiv:2105.03276$\\\\$\n[3] M. Honda\, E. Itou\, Y. Kiku chi and Y. Tanizaki arXiv:2110.14105\n LOCATION:https://researchseminars.org/talk/NMTP2022/15/ END:VEVENT END:VCALENDAR