5 papers · 1 filter
The Kirkwood-Dirac representation associated to the Fourier transform for finite abelian groups: positivity
Stephan De Bièvre, Christopher Langrenez, Danylo Radchenko
We construct and study the Kirkwood-Dirac (KD) representations naturally associated to the Fourier transform of finite abelian groups . We identify all pure KD-positive states a…
Relating the Entanglement and Optical Nonclassicality of Multimode States of a Bosonic Quantum Field
Anaelle Hertz, Nicolas J. Cerf, Stephan De Bièvre
The quantum nature of the state of a bosonic quantum field manifests itself in its entanglement, coherence, or optical nonclassicality which are each known to be resources for quan…
Dynamics of the mean-field interacting quantum kicked rotor
Samuel Lellouch, Adam Rançon, Stephan De Bièvre +2
We study the dynamics of the many-body atomic kicked rotor with interactions at the mean-field level, governed by the Gross-Pitaevskii equation. We show that dynamical localization…
Quadrature coherence scale driven fast decoherence of bosonic quantum field states
Anaelle Hertz, Stephan De Bièvre
We introduce, for each state of a bosonic quantum field, its quadrature coherence scale (QCS), a measure of the range of its quadrature coherences. Under coupling to a thermal bath…
Measuring nonclassicality of bosonic field quantum states via operator ordering sensitivity
Stephan De Bievre, Dmitri B. Horoshko, Giuseppe Patera +1
We introduce a new distance-based measure for the nonclassicality of the states of a bosonic field, which outperforms the existing such measures in several ways. We define for that…