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Portrait of Tönu Pullerits; Photo: Kennet Ruona

Tönu Pullerits

Professor

Portrait of Tönu Pullerits; Photo: Kennet Ruona

Projection-based adiabatic elimination of bipartite open quantum systems

Author

  • Ibrahim Saideh
  • Daniel Finkelstein-Shapiro
  • Camille Noûs
  • Tõnu Pullerits
  • Arne Keller

Summary, in English

Adiabatic elimination methods allow the reduction of the space dimension needed to describe systems whose dynamics exhibit separation of timescale. For open quantum systems, it consists in eliminating the fast part assuming it has almost instantaneously reached its steady state and obtaining an approximation of the evolution of the slow part. These methods can be applied to eliminate a linear subspace within the system Hilbert space or, alternatively, to eliminate a fast subsystem in a bipartite quantum system. In this work, we extend an adiabatic elimination method used for removing fast degrees of freedom within a system [Phys. Rev. A 101, 042102 (2020)2469-992610.1103/PhysRevA.101.042102] to eliminate a subsystem from an open bipartite quantum system. As an illustration, we apply our technique to a dispersively coupled two-qubit system and in the case of the open Rabi model.

Department/s

  • Chemical Physics
  • NanoLund: Center for Nanoscience

Publishing year

2020

Language

English

Publication/Series

Physical Review A

Volume

102

Issue

3

Document type

Journal article

Publisher

American Physical Society

Topic

  • Condensed Matter Physics
  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 2469-9926