66 citations · 289 across the 28 of their papers we have counts for
29 papers
Agreement and Compatibility in Wigner's Friend Paradox
Julio C. F. Silva, B. F. Rizzuti, Cristhiano Duarte
There has been an upsurge of interest in the consequences for quantum physics of the so-called Wigner's Friend Paradox. In its original formulation, the paradox has been turned ins…
Emergent Quantum Dynamics as a Bayesian Inference Problem: A Critical Analysis
Thales B. S. F. Rodrigues, Lucas L. Brugger, Vinicius G. Valle +2
Coarse-grained descriptions can be used to account for physical processes in which information is lost or not entirely accessible. In this paper, we start by proposing a connection…
Recasting Schrödinger's Cat Thought Experiment as a Remote Measurement Problem
Lucas L. Brugger, Cristhiano Duarte, Bruno F. Rizzuti
With 2025 being declared the Year of Quantum Science and Technology, our contribution seeks to provide a fresh perspective on Schrödinger's cat thought experiment. We reinterpret t…
Distillation of quantum non-Markovianity
Thiago Melo D. Azevedo, Cristhiano Duarte, Nadja K. Bernardes
Non-Markovianty of open quantum systems dynamics is a physically relevant property which is usually associated with the backflow of (quantum) information. Using this paradigmatic m…
Witnessing the non-objectivity of an unknown quantum dynamics
Davide Poderini, Giovanni Rodari, George Moreno +6
Quantum Darwinism offers an explanation for the emergence of classical objective features -- those we are used to at macroscopic scales -- from quantum properties at the microscopi…
No-local-broadcasting theorem for non-signalling behaviours and assemblages
Adrian Solymos, Carlos Vieira, Cristhiano Duarte +1
The no-broadcasting theorem is a fundamental result in quantum information theory. It guarantees that a class of attacks on quantum protocols, based on eavesdropping and indiscrimi…
One Hundred Years Later: Stern-Gerlach Experiment and Dimension Witnesses
R. Grossi, Lucas L. Brugger, B. F. Rizzuti +1
Inspired by the one-hundredth anniversary of the seminal works of Stern and Gerlach, our contribution is a proposal of how to use their famous experiment in a more contemporary per…
Generalising Aumann's Agreement Theorem
Matthew Leifer, Cristhiano Duarte
According to Aumann's celebrated theorem, rational agents cannot agree to disagree. In other words, agents who once shared a common prior probability distribution and who have comm…
Analysis of Neural Network Predictions for Entanglement Self-Catalysis
Thaís M. Acácio, Cristhiano Duarte
Machine learning techniques have been successfully applied to classifying an extensive range of phenomena in quantum theory. From detecting quantum phase transitions to identifying…
Events in quantum mechanics are maximally non-absolute
George Moreno, Ranieri Nery, Cristhiano Duarte +1
The notorious quantum measurement problem brings out the difficulty to reconcile two quantum postulates: the unitary evolution of closed quantum systems and the wave-function colla…
Emergence of noncontextuality under quantum Darwinism
Roberto D. Baldijão, Rafael Wagner, Cristhiano Duarte +2
Quantum Darwinism proposes that the proliferation of redundant information plays a major role in the emergence of objectivity out of the quantum world. Is this kind of objectivity…
Relating compatibility and divisibility of quantum channels
Cristhiano Duarte, Lorenzo Catani, Raphael C. Drumond
We connect two key concepts in quantum information: compatibility and divisibility of quantum channels. Two channels are compatible if they can be both obtained via marginalization…
Investigating Coarse-Grainings and Emergent Quantum Dynamics with Four Mathematical Perspectives
Cristhiano Duarte, Barbara Amaral, Marcelo Terra Cunha +1
With the birth of quantum information science, many tools have been developed to deal with many-body quantum systems. Although a complete description of such systems is desirable,…
Bell Non-Locality in Many Body Quantum Systems with Exponential Decay of Correlations
Carlos H. S. Vieira, Cristhiano Duarte, Raphael C. Drumond +1
Using Bell-inequalities as a tool to explore non-classical physical behaviours, in this paper we analyze what one can expect to find in many-body quantum physics. Concretely, frami…
Semidefinite tests for quantum network topologies
Johan Åberg, Ranieri Nery, Cristhiano Duarte +1
Quantum networks play a major role in long-distance communication, quantum cryptography, clock synchronization, and distributed quantum computing. Generally, these protocols involv…
Noncontextuality Inequalities from Antidistinguishability
Matthew S. Leifer, Cristhiano Duarte
Noncontextuality inequalities are usually derived from the distinguishability properties of quantum states, i.e. their orthogonality. Here, we show that antidistinguishability can…
Effective state as compatibility between agents
Cristhiano Duarte
Shedding a new light in the coarse-graining scenario, in this contribution we came up with different necessary and sufficient conditions for the existence of a well-defined coarse-…
Graph Approach to Extended Contextuality
Barbara Amaral, Cristhiano Duarte
Exploring the graph approach, we restate the extended definition of noncontextuality provided by the contextuality-by-default framework. This extended definition avoids the assumpt…
Shielding Property in Higher Dimensions
Natália S. Móller, Alberto L. de Paula, Cristhiano Duarte +1
When the reduced state of a many-body quantum system is independent of its remaining parts, we say it shows what has become known by shielding property. Under some assumptions, equ…
Geometry of the quantum set on no-signaling faces
Ashutosh Rai, Cristhiano Duarte, Samurai Brito +1
Since Bell's theorem we know that quantum mechanics is incompatible with local hidden-variable models, the phenomenon known as quantum nonlocality. However, despite steady progress…
Concentration phenomena in the geometry of Bell correlations
Cristhiano Duarte, Samuraí Brito, Barbara Amaral +1
Bell's theorem shows that local measurements on entangled states give rise to correlations incompatible with local hidden variable models. The degree of quantum nonlocality is not…
Small violations of Bell inequalities for multipartite pure random states
Cristhiano Duarte, Raphael C. Drumond, Roberto I. Oliveira
For any finite number of parts, measurements and outcomes in a Bell scenario we estimate the probability of random -quit pure states to substantially violate any Bell inequal…
Resource theory of contextuality for arbitrary prepare-and-measure experiments
Cristhiano Duarte, Barbara Amaral
Contextuality has been identified as a potential resource responsible for the quantum advantage in several tasks. It is then necessary to develop a resource-theoretic framework for…
Necessary Conditions for Extended Noncontextuality in General Sets of Random Variables
Barbara Amaral, Cristhiano Duarte, Roberto I. Oliveira
We explore the graph approach to contextuality to restate the extended definition of noncontextuality as given by J. Kujala et. al. [Phys. Rev. Lett. 115, 150401 (2015)] using grap…