no code implementations • 8 Aug 2022 • Askery Canabarro, Taysa M. Mendonça, Ranieri Nery, George Moreno, Anton S. Albino, Gleydson F. de Jesus, Rafael Chaves
Previously only considered a frontier area of Physics, nowadays quantum computing is one of the fastest growing research field, precisely because of its technological applications in optimization problems, machine learning, information security and simulations.
no code implementations • 4 Nov 2021 • Nikolai Miklin, Mariami Gachechiladze, George Moreno, Rafael Chaves
However, if this independence condition is not met, can we still work with imperfect instrumental variables?
no code implementations • 2 Aug 2021 • Davide Poderini, Emanuele Polino, Giovanni Rodari, Alessia Suprano, Rafael Chaves, Fabio Sciarrino
The violation of a Bell inequality is the paradigmatic example of device-independent quantum information: the nonclassicality of the data is certified without the knowledge of the functioning of devices.
no code implementations • 12 May 2021 • Rafael Chaves, George Moreno, Emanuele Polino, Davide Poderini, Iris Agresti, Alessia Suprano, Mariana R. Barros, Gonzalo Carvacho, Elie Wolfe, Askery Canabarro, Robert W. Spekkens, Fabio Sciarrino
Bell's theorem is typically understood as the proof that quantum theory is incompatible with local-hidden-variable models.
no code implementations • 4 Feb 2021 • George Moreno, Ranieri Nery, Carlos de Gois, Rafael Rabelo, Rafael Chaves
Superdense coding is a paradigmatic protocol in quantum information science, employing a quantum communication channel to send classical information more efficiently.
Quantum Physics
no code implementations • 2 Jul 2020 • Mariami Gachechiladze, Nikolai Miklin, Rafael Chaves
Quantum mechanics challenges our intuition on the cause-effect relations in nature.
1 code implementation • 25 Sep 2019 • M. G. M. Moreno, Samuraí Brito, Ranieri V. Nery, Rafael Chaves
Bell nonlocality, the fact that local hidden variable models cannot reproduce the correlations obtained by measurements on entangled states, is a cornerstone in our modern understanding of quantum theory.
Quantum Physics
1 code implementation • 18 Apr 2019 • Alejandro Pozas-Kerstjens, Rafael Rabelo, Łukasz Rudnicki, Rafael Chaves, Daniel Cavalcanti, Miguel Navascues, Antonio Acín
We present a method that allows the study of classical and quantum correlations in networks with causally-independent parties, such as the scenario underlying entanglement swapping.
Quantum Physics
1 code implementation • 2 Apr 2019 • Askery Canabarro, Felipe Fernandes Fanchini, André Luiz Malvezzi, Rodrigo Pereira, Rafael Chaves
The classification of phase transitions is a central and challenging task in condensed matter physics.
no code implementations • 21 Aug 2018 • Askery Canabarro, Samuraí Brito, Rafael Chaves
The ability to witness non-local correlations lies at the core of foundational aspects of quantum mechanics and its application in the processing of information.
no code implementations • 3 Jan 2017 • Aditya Kela, Kai von Prillwitz, Johan Aberg, Rafael Chaves, David Gross
Testing whether a probability distribution is compatible with a given Bayesian network is a fundamental task in the field of causal inference, where Bayesian networks model causal relations.
no code implementations • 17 Nov 2014 • Rafael Chaves, Richard Kueng, Jonatan Bohr Brask, David Gross
Bell's Theorem shows that quantum mechanical correlations can violate the constraints that the causal structure of certain experiments impose on any classical explanation.