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 …

Quasiprobabilities in quantum thermodynamics and many-body systems

S Gherardini, G De Chiara - PRX Quantum, 2024 - APS
In this tutorial, we present the definition, interpretation, and properties of some of the main
quasiprobabilities that can describe the statistics of measurement outcomes evaluated at …

Kirkwood-Dirac quasiprobability approach to the statistics of incompatible observables

M Lostaglio, A Belenchia, A Levy… - Quantum, 2023 - quantum-journal.org
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 …

Quasiprobability distribution for heat fluctuations in the quantum regime

A Levy, M Lostaglio - PRX Quantum, 2020 - APS
The standard approach to deriving fluctuation theorems fails to capture the effect of quantum
correlation and coherence in the initial state of the system. Here, we overcome this difficulty …

Work statistics, quantum signatures, and enhanced work extraction in quadratic fermionic models

A Santini, A Solfanelli, S Gherardini, M Collura - Physical Review B, 2023 - APS
In quadratic fermionic models, we determine a quantum correction to the work statistics after
both a sudden quench and a time-dependent driving. Such a correction lies in the …

End-point measurement approach to assess quantum coherence in energy fluctuations

S Gherardini, A Belenchia, M Paternostro… - Physical Review A, 2021 - APS
We discuss the role of quantum coherence in the energy fluctuations of open quantum
systems. To this aim, we introduce a protocol to which we refer as the end-point …

[PDF][PDF] Kirkwood-Dirac quasiprobability approach to quantum fluctuations: Theoretical and experimental perspectives

M Lostaglio, A Belenchia, A Levy… - arxiv preprint arxiv …, 2022 - researchgate.net
The existence of incompatible physical observables is one of the features that better casts
quantum physics apart from classical mechanics. In fact, incompatible observables are at the …

Autonomous dissipative Maxwell's demon in a diamond spin qutrit

S Hernández-Gómez, S Gherardini, N Staudenmaier… - PRX Quantum, 2022 - APS
Engineered dynamical maps combining coherent and dissipative transformations of
quantum states with quantum measurements have demonstrated a number of technological …

Quantum many-body Jarzynski equality and dissipative noise on a Digital Quantum computer

D Hahn, M Dupont, M Schmitt, DJ Luitz, M Bukov - Physical Review X, 2023 - APS
The quantum Jarzynski equality and the Crooks relation are fundamental laws connecting
equilibrium processes with nonequilibrium fluctuations. They are promising tools to …

Work as an external quantum observable and an operational quantum work fluctuation theorem

K Beyer, K Luoma, WT Strunz - Physical Review Research, 2020 - APS
We propose a definition of externally measurable quantum work in driven systems. Work is
given as a quantum observable on a control device which is forcing the system and can be …