180 citations · 418 across the 11 of their papers we have counts for
11 papers
Circuit connectivity boosts by quantum-classical-quantum interfaces
Roeland Wiersema, Leonardo Guerini, Juan Felipe Carrasquilla +1
High-connectivity circuits are a major roadblock for current quantum hardware. We propose a hybrid classical-quantum algorithm to simulate such circuits without swap-gate ladders.…
Quasiprobabilistic state-overlap estimator for NISQ devices
Leonardo Guerini, Roeland Wiersema, Juan Felipe Carrasquilla +1
As quantum technologies mature, the development of tools for benchmarking their ability to prepare and manipulate complex quantum states becomes increasingly necessary. A key conce…
Experimental device-independent certified randomness generation with an instrumental causal structure
Iris Agresti, Davide Poderini, Leonardo Guerini +6
The intrinsic random nature of quantum physics offers novel tools for the generation of random numbers, a central challenge for a plethora of fields. Bell non-local correlations ob…
Distributed sampling, quantum communication witnesses, and measurement incompatibility
Leonardo Guerini, Marco Túlio Quintino, Leandro Aolita
We study prepare-and-measure experiments where the sender (Alice) receives trusted quantum inputs but has an untrusted state-preparation device and the receiver (Bob) has a fully-u…
Joint measurability meets Birkhoff-von Neumann's theorem
Leonardo Guerini, Alexandre Baraviera
Quantum measurements can be interpreted as a generalisation of probability vectors, in which non-negative real numbers are replaced by positive semi-definite operators. We extrapol…
Uniqueness of the joint measurement and the structure of the set of compatible quantum measurements
Leonardo Guerini, Marcelo Terra Cunha
We address the problem of characterising the compatible tuples of measurements that admit a unique joint measurement. We derive a uniqueness criterion based on the method of pertur…
Operational framework for quantum measurement simulability
Leonardo Guerini, Jessica Bavaresco, Marcelo Terra Cunha +1
We introduce a framework for simulating quantum measurements based on classical processing of a set of accessible measurements. Well-known concepts such as joint measurability and…
Most incompatible measurements for robust steering tests
Jessica Bavaresco, Marco Túlio Quintino, Leonardo Guerini +3
We address the problem of characterizing the steerability of quantum states under restrictive measurement scenarios, i.e., the problem of determining whether a quantum state can de…
Simulating positive-operator-valued measures with projective measurements
Michał Oszmaniec, Leonardo Guerini, Peter Wittek +1
Standard projective measurements represent a subset of all possible measurements in quantum physics, defined by positive-operator-valued measures. We study what quantum measurement…
General method for constructing local-hidden-variable models for entangled quantum states
Daniel Cavalcanti, Leonardo Guerini, Rafael Rabelo +1
Entanglement allows for the nonlocality of quantum theory, which is the resource behind device-independent quantum information protocols. However, not all entangled quantum states…
Local models and hidden nonlocality in Quantum Theory
Leonardo Guerini
This Master's thesis has two central subjects: the simulation of correlations generated by local measurements on entangled quantum states by local hidden-variables models and the r…