Negative quasiprobabilities enhance phase estimation in quantum-optics experiment
N Lupu-Gladstein, YB Yilmaz… - Physical Review Letters, 2022 - APS
Operator noncommutation, a hallmark of quantum theory, limits measurement precision,
according to uncertainty principles. Wielded correctly, though, noncommutation can boost …
according to uncertainty principles. Wielded correctly, though, noncommutation can boost …
Quasiprobabilities in quantum thermodynamics and many-body systems: A tutorial
S Gherardini, G De Chiara - arXiv preprint arXiv:2403.17138, 2024 - arxiv.org
Quasiprobabilities are mathematical quantities describing the statistics of measurement
outcomes evaluated at two or more times, which incorporate the incompatibility of the …
outcomes evaluated at two or more times, which incorporate the incompatibility of the …
Enhanced tripartite interactions in spin-magnon-mechanical hybrid systems
Coherent tripartite interactions among degrees of freedom of completely different nature are
instrumental for quantum information and simulation technologies, but they are generally …
instrumental for quantum information and simulation technologies, but they are generally …
[HTML][HTML] Quantum advantage in postselected metrology
DRM Arvidsson-Shukur, N Yunger Halpern… - Nature …, 2020 - nature.com
In every parameter-estimation experiment, the final measurement or the postprocessing
incurs a cost. Postselection can improve the rate of Fisher information (the average …
incurs a cost. Postselection can improve the rate of Fisher information (the average …
Quantifying quantum coherence via Kirkwood-Dirac quasiprobability
A Budiyono, HK Dipojono - Physical Review A, 2023 - APS
Kirkwood-Dirac (KD) quasiprobability is a quantum analog of phase space probability of
classical statistical mechanics, allowing negative or/and nonreal values. It gives an …
classical statistical mechanics, allowing negative or/and nonreal values. It gives an …
Properties and Applications of the Kirkwood-Dirac Distribution
DRM Arvidsson-Shukur, WF Braasch Jr… - arXiv preprint arXiv …, 2024 - arxiv.org
The most famous quasi-probability distribution, the Wigner function, has played a pivotal role
in the development of a continuous-variable quantum theory that has clear analogues of …
in the development of a continuous-variable quantum theory that has clear analogues of …
Quasiprobability behind the out-of-time-ordered correlator
Two topics, evolving rapidly in separate fields, were combined recently: the out-of-time-
ordered correlator (OTOC) signals quantum-information scrambling in many-body systems …
ordered correlator (OTOC) signals quantum-information scrambling in many-body systems …
Experimental Investigation of Quantum -Enhanced Sensor
PT-symmetric theory is developed to extend quantum mechanics to a complex region, but it
wins its great success first in classical systems, for example, optical waveguides and electric …
wins its great success first in classical systems, for example, optical waveguides and electric …
Complete incompatibility, support uncertainty, and Kirkwood-Dirac nonclassicality
S De Bièvre - Physical Review Letters, 2021 - APS
For quantum systems with a finite dimensional Hilbert space of states, we show that the
complete incompatibility of two observables—a notion we introduce—is equivalent to the …
complete incompatibility of two observables—a notion we introduce—is equivalent to the …
[HTML][HTML] Kirkwood-Dirac quasiprobability approach to the statistics of incompatible observables
Recent work has revealed the central role played by the Kirkwood-Dirac quasiprobability
(KDQ) as a tool to properly account for non-classical features in the context of condensed …
(KDQ) as a tool to properly account for non-classical features in the context of condensed …