RQC Seminar

255th RQC Seminar

• Speaker

  Dr. Graeme Pleasance
  ( University of Stellenbosch, South Africa )

• Date

  16:00-17:00, (4:00 p.m.-5:00 p.m.) Friday, February 13, 2026

• Venue

  Hybrid( Zoom,
  345-347 Seminar Room, 3F, Main Research Building, Wako Campus / 和光地区 研究本館3階 セミナー室 (345-347) (C01))

• Title

  Efficient Pseudomode Mapping for Strongly Coupled Open Quantum Systems

• Inquiries

  norilab_rqc_assist[at]ml.riken.jp

Abstract
The pseudomode (PM) method has emerged as powerful tool for treating both the dynamics and thermodynamics of strongly-coupled open quantum systems. Despite its versatility, current challenges with the method - particularly with regard to parameter optimisation and optimal choice of ansatz (coupled PMs, non-Hermitian couplings, e.t.c) - persist. In this talk, I will introduce a new, generalizable approach for extracting the parameters of a coupled PM network that is both efficient and scales to an arbitrary number of PMs. This enables the low cost simulation of potentially highly complex, non-Markovian environments, while avoiding issues where the choice of ansatz can introduce numerical instabilities into the dynamics. I will finally demonstrate the effectiveness of the approach on the spin-boson model.