197 citations · 976 across the 13 of their papers we have counts for
13 papers
Bell nonlocality with a single shot
Mateus Araújo, Flavien Hirsch, Marco Túlio Quintino
In order to reject the local hidden variables hypothesis, the usefulness of a Bell inequality can be quantified by how small a p-value it will give for a physical experiment. Here…
Computational advantage from quantum superposition of multiple temporal orders of photonic gates
Márcio M. Taddei, Jaime Cariñe, Daniel Martínez +9
Models for quantum computation with circuit connections subject to the quantum superposition principle have been recently proposed. There, a control quantum system can coherently d…
Semi-device-independent certification of indefinite causal order
Jessica Bavaresco, Mateus Araújo, Časlav Brukner +1
When transforming pairs of independent quantum operations according to the fundamental rules of quantum theory, an intriguing phenomenon emerges: some such higher-order operations…
Comment on "The photon identification loophole in EPRB experiments: computer models with single-wing selection"
Mateus Araújo, Philippe Grangier, Jan-Åke Larsson
Contrary to the claims made in Ref. [1], the recent Bell tests by Giustina et al. and Shalm et al. do not suffer from a "photon identification loophole". The model discussed in Ref…
Compressible Ferrimagnetism in the depleted Periodic Anderson Model
N. C. Costa, M. V. Araújo, J. P. Lima +3
Tight-binding Hamiltonians with single and multiple orbitals exhibit an intriguing array of magnetic phase transitions. In most cases the spin ordered phases are insulating, while…
A purification postulate for quantum mechanics with indefinite causal order
Mateus Araújo, Adrien Feix, Miguel Navascués +1
To study which are the most general causal structures which are compatible with local quantum mechanics, Oreshkov et al. introduced the notion of a process: a resource shared betwe…
Causally nonseparable processes admitting a causal model
Adrien Feix, Mateus Araújo, Časlav Brukner
A recent framework of quantum theory with no global causal order predicts the existence of "causally nonseparable" processes. Some of these processes produce correlations incompati…
The simplest causal inequalities and their violation
Cyril Branciard, Mateus Araújo, Adrien Feix +2
In a scenario where two parties share, act on and exchange some physical resource, the assumption that the parties' actions are ordered according to a definite causal structure yie…
Quantum superposition of the order of parties as a communication resource
Adrien Feix, Mateus Araújo, Časlav Brukner
In a variant of communication complexity tasks, two or more separated parties cooperate to compute a function of their local data, using a limited amount of communication. It is kn…
Witnessing causal nonseparability
Mateus Araújo, Cyril Branciard, Fabio Costa +3
Our common understanding of the physical world deeply relies on the notion that events are ordered with respect to some time parameter, with past events serving as causes for futur…
Quantum circuits cannot control unknown operations
Mateus Araújo, Adrien Feix, Fabio Costa +1
One of the essential building blocks of classical computer programs is the "if" clause, which executes a subroutine depending on the value of a control variable. Similarly, several…
All noncontextuality inequalities for the n-cycle scenario
Mateus Araújo, Marco Túlio Quintino, Costantino Budroni +2
The problem of separating classical from quantum correlations is in general intractable and has been solved explicitly only in few cases. In particular, known methods cannot provid…
Tests of Bell inequality with arbitrarily low photodetection efficiency and homodyne measurements
Mateus Araújo, Marco Túlio Quintino, Daniel Cavalcanti +3
We show that hybrid local measurements combining homodyne measurements and photodetection provide violations of a Bell inequality with arbitrarily low photodetection efficiency. Th…