62 citations · 385 across the 27 of their papers we have counts for
10 papers · 1 filter
What is special about the Kirkwood-Dirac distributions? Only they produce natural conditional expectations
Matéo Spriet, Christopher Langrenez, Raymond Brummelhuis +1
Among the many quasiprobability representations of quantum mechanics, the family of Kirkwood-Dirac (KD) representations has come to the foreground in recent years. Each such KD rep…
Contextuality Can be Verified with Noncontextual Experiments
Jonathan J. Thio, Wilfred Salmon, Crispin H. W. Barnes +2
We uncover new features of generalized contextuality by connecting it to the Kirkwood-Dirac (KD) quasiprobability distribution. Quantum states can be represented by KD distribution…
Convex roofs witnessing Kirkwood-Dirac nonpositivity
Christopher Langrenez, Stephan De Bièvre, David R. M. Arvidsson-Shukur
Given two observables and , one can associate to every quantum state a Kirkwood-Dirac (KD) quasiprobability distribution. KD distributions are like joint classical probabili…
Properties and Applications of the Kirkwood-Dirac Distribution
David R. M. Arvidsson-Shukur, William F. Braasch, Stephan De Bievre +6
Recent years have seen the Kirkwood-Dirac (KD) distribution come to the forefront as a powerful quasi-probability distribution for analysing quantum mechanics. The KD distribution…
Rigorous results on approach to thermal equilibrium, entanglement, and nonclassicality of an optical quantum field mode scattering from the elements of a non-equilibrium quantum reservoir
Stephan De Bievre, Marco Merkli, Paul E. Parris
Rigorous derivations of the approach of individual elements of large isolated systems to a state of thermal equilibrium, starting from arbitrary initial states, are exceedingly rar…
Characterizing the geometry of the Kirkwood-Dirac positive states
Christopher Langrenez, David R. M. Arvidsson-Shukur, Stephan De Bièvre
The Kirkwood-Dirac (KD) quasiprobability distribution can describe any quantum state with respect to the eigenbases of two observables and . KD distributions behave similarl…
Interferometric measurement of the quadrature coherence scale using two replicas of a quantum optical state
Célia Griffet, Matthieu Arnhem, Stephan De Bièvre +1
Assessing whether a quantum state is nonclassical (, incompatible with a mixture of coherent states) is a ubiquitous question in quantum optics, yet a nontr…
Relating incompatibility, noncommutativity, uncertainty and Kirkwood-Dirac nonclassicality
Stephan De Bievre
We provide an in-depth study of the recently introduced notion of completely incompatible observables and its links to the support uncertainty and to the Kirkwood-Dirac nonclassica…
Decoherence and nonclassicality of photon-added/subtracted multi-mode Gaussian states
Anaelle Hertz, Stephan De Bièvre
Photon addition and subtraction render Gaussian states non-Gaussian. We provide a quantitative analysis of the change in nonclassicality produced by these processes by analyzing th…
Kirkwood-Dirac nonclassicality, support uncertainty and complete incompatibility
Stephan De Bievre
Given two orthonormal bases in a d-dimensional Hilbert space, one associates to each state its Kirkwood-Dirac (KD) quasi-probability distribution. KD-nonclassical states - for whic…