Kochen-specker contextuality

C Budroni, A Cabello, O Gühne, M Kleinmann… - Reviews of Modern …, 2022 - APS
A central result in the foundations of quantum mechanics is the Kochen-Specker theorem. In
short, it states that quantum mechanics is in conflict with classical models in which the result …

Certifying quantum temporal correlation via randomized measurements: Theory and experiment

H Liu, Z Liu, S Chen, X Nie, X Liu, D Lu - Physical Review Letters, 2025 - APS
We consider the certification of temporal quantum correlations using the pseudo-density
operator (PDO), an extension of the density matrix to the time domain, where negative …

Leggett-Garg macrorealism and temporal correlations

G Vitagliano, C Budroni - Physical Review A, 2023 - APS
Leggett and Garg formulated macrorealist models encoding our intuition on classical
systems, ie, physical quantities have a definite value that can be measured with minimal …

Implementing quantum dimensionality reduction for non-Markovian stochastic simulation

KD Wu, C Yang, RD He, M Gu, GY **ang, CF Li… - Nature …, 2023 - nature.com
Complex systems are embedded in our everyday experience. Stochastic modelling enables
us to understand and predict the behaviour of such systems, cementing its utility across the …

Quantum clocks are more accurate than classical ones

MP Woods, R Silva, G Pütz, S Stupar, R Renner - PRX Quantum, 2022 - APS
A clock is, from an information-theoretic perspective, a system that emits information about
time. One may therefore ask whether the theory of information imposes any constraints on …

Entanglement-breaking channels are a quantum memory resource

LB Vieira, HY Ku, C Budroni - arxiv preprint arxiv:2402.16789, 2024 - arxiv.org
Entanglement-breaking channels (equivalently, measure-and-prepare channels) are an
important class of quantum operations noted for their ability to destroy multipartite spatial …

Delayed-choice causal order and nonclassical correlations

S Milz, D Jurkschat, FA Pollock, K Modi - Physical Review Research, 2021 - APS
Recent frameworks describing quantum mechanics in the absence of a global causal order
admit the existence of causally indefinite processes, where it is impossible to ascribe causal …

Optimization of Time-Ordered Processes in the Finite and Asymptotic Regimes

M Weilenmann, C Budroni, M Navascués - PRX Quantum, 2024 - APS
Many problems in quantum information theory can be formulated as optimizations over the
sequential outcomes of dynamical systems subject to unpredictable external influences …

Temporal correlations in the simplest measurement sequences

LB Vieira, C Budroni - Quantum, 2022 - quantum-journal.org
We investigate temporal correlations in the simplest measurement scenario, ie, that of a
physical system on which the same measurement is performed at different times, producing …

Witnessing environment dimension through temporal correlations

LB Vieira, S Milz, G Vitagliano, C Budroni - Quantum, 2024 - quantum-journal.org
We introduce a framework to compute upper bounds for temporal correlations achievable in
open quantum system dynamics, obtained by repeated measurements on the system. As …