Klaus Ziegler

Aug 5, 2024 | link.aps.org | Quancheng Liu |Advanced Materials |Klaus Ziegler |Institut für Physik

The evolution of noninteracting bosons in the presence of repeated projective measurements is studied. Following the established approach, this monitored evolution is characterized by the first detected return and the first detected transition probabilities. We show that these quantities are directly related to the entanglement entropy and the entanglement spectrum of a bipartite system.

May 15, 2023 | onlinelibrary.wiley.com | Klaus Ziegler

1 INTRODUCTION One of the most fascinating observations in condensed matter physics is the pairing effect, leading to phenomena such as superconductivity and superfluidity. Although the pairing effect is of quantum nature, its theoretical description in terms of a macroscopic order parameter field is given by a mean-field (or Ginzburg-Landau) theory.