205 citations · 1.8k across the 45 of their papers we have counts for
45 papers
Least Variable Quantum Counting Processes
Bita Olamaei, Florian Meier, Costantino Budroni +2
Counting processes provide a fundamental description of stochastic events ranging from photon detection to clock ticks. A central question is how accurately such events can be time…
Strict hierarchy between -wise measurement simulability, compatibility structures, and multi-copy compatibility
Lucas Tendick, Costantino Budroni, Marco Túlio Quintino
The incompatibility of quantum measurements, i.e. the fact that certain observable quantities cannot be measured jointly is widely regarded as a distinctive quantum feature with im…
Indefinite causal order in boxworld theories
Jessica Bavaresco, Ämin Baumeler, Yelena Guryanova +1
An astonishing feature of higher-order quantum theory is that it can accommodate indefinite causal order. In the simplest bipartite setting, there exist signaling correlations for…
Entanglement detection in quantum materials with competing orders
Giacomo Mazza, Costantino Budroni
We investigate entanglement detection in quantum materials through criteria based on the simultaneous suppression of collective matter excitations. Unlike other detection schemes,…
Entanglement-breaking channels are a quantum memory resource
Lucas B. Vieira, Huan-Yu Ku, Costantino Budroni
Entanglement-breaking channels (equivalently, measure-and-prepare channels) are an important class of quantum operations noted for their ability to destroy multipartite spatial qua…
Memory attacks in network nonlocality and self-testing
Mirjam Weilenmann, Costantino Budroni, Miguel Navascues
We study what can or cannot be certified in communication scenarios where the assumption of independence and identical distribution (iid) between experimental rounds fails. In this…
Characterisation and fundamental limitations of irreversible stochastic steering distillation
Chung-Yun Hsieh, Huan-Yu Ku, Costantino Budroni
Steering resources, central for quantum advantages in one-sided device-independent quantum information tasks, can be enhanced via local filters. Recently, reversible steering conve…
Measurement incompatibility cannot be stochastically distilled
Huan-Yu Ku, Chung-Yun Hsieh, Costantino Budroni
We show that the incompatibility of a set of measurements cannot be increased by subjecting them to a filter, namely, by combining them with a device that post-selects the incoming…
Witnessing environment dimension through temporal correlations
Lucas B. Vieira, Simon Milz, Giuseppe Vitagliano +1
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 these cor…
Optimisation of time-ordered processes in the finite and asymptotic regime
Mirjam Weilenmann, Costantino Budroni, Miguel Navascues
Many problems in quantum information theory can be formulated as optimizations over the sequential outcomes of dynamical systems subject to unpredictable external influences. Such…
Leggett-Garg Macrorealism and temporal correlations
Giuseppe Vitagliano, Costantino Budroni
Leggett and Garg formulated macrorealist models encoding our intuition on classical systems, i.e., physical quantities have a definite value that can be measured with minimal distu…
Complete classification of steerability under local filters and its relation with measurement incompatibility
Huan-Yu Ku, Chung-Yun Hsieh, Shin-Liang Chen +2
Quantum steering is the central resource for one-sided device-independent quantum information. It is manipulated via one-way local operations and classical communication, such as l…
Temporal correlations in the simplest measurement sequences
Lucas B. Vieira, Costantino Budroni
We investigate temporal correlations in the simplest measurement scenario, i.e., that of a physical system on which the same measurement is performed at different times, producing…
Kochen-Specker Contextuality
Costantino Budroni, Adán Cabello, Otfried Gühne +2
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…
Device-independent quantification of measurement incompatibility
Shin-Liang Chen, Nikolai Miklin, Costantino Budroni +1
Incompatible measurements, i.e., measurements that cannot be simultaneously performed, are necessary to observe nonlocal correlations. It is natural to ask, e.g., how incompatible…
Disease control as an optimization problem
Miguel Navascues, Costantino Budroni, Yelena Guryanova
In the context of epidemiology, policies for disease control are often devised through a mixture of intuition and brute-force, whereby the set of logically conceivable policies is…
Ticking-clock performance enhanced by nonclassical temporal correlations
Costantino Budroni, Giuseppe Vitagliano, Mischa P. Woods
We investigate the role of nonclassical temporal correlations in enhancing the performance of ticking clocks in a discrete-time scenario. We show that the problem of optimal models…
Simulating extremal temporal correlations
Cornelia Spee, Costantino Budroni, Otfried Gühne
The correlations arising from sequential measurements on a single quantum system form a polytope. This is defined by the arrow-of-time (AoT) constraints, meaning that future choice…
Quantum Temporal Superposition: the case of QFT
Laura J. Henderson, Alessio Belenchia, Esteban Castro-Ruiz +4
Quantum field theory is completely characterized by the field correlations between spacetime points. In turn, some of these can be accessed by locally coupling to the field simple…
Memory cost of temporal correlations
Costantino Budroni, Gabriel Fagundes, Matthias Kleinmann
A possible notion of nonclassicality for single systems can be defined on the basis of the notion of memory cost of classically simulating probabilities observed in a temporal sequ…
Device-independent tests of structures of measurement incompatibility
Marco Túlio Quintino, Costantino Budroni, Erik Woodhead +2
In contrast with classical physics, in quantum physics some sets of measurements are incompatible in the sense that they can not be performed simultaneously. Among other applicatio…
Leggett-Garg macrorealism and the quantum nondisturbance conditions
Roope Uola, Giuseppe Vitagliano, Costantino Budroni
We investigate the relation between a refined version of Leggett and Garg conditions for macrorealism, namely the no-signaling-in-time (NSIT) conditions, and the quantum mechanical…
Theoretical research without projects
Miguel Navascues, Costantino Budroni
We propose a funding scheme for theoretical research that does not rely on project proposals, but on recent past scientific productivity. Given a quantitative figure of merit on th…
Exploring the framework of assemblage moment matrices and its applications in device-independent characterizations
Shin-Liang Chen, Costantino Budroni, Yeong-Cherng Liang +1
In a recent work [Phys. Rev. Lett. 116, 240401 (2016)], a framework known by the name of "assemblage moment matrices" (AMMs) has been introduced for the device-independent quantifi…