18 citations · 69 across the 17 of their papers we have counts for
18 papers
Quantum key distribution using generalized contextuality against post-quantum eavesdroppers
Daniel Centeno, Roberto D. Baldijão, Maria Ciudad Alañón +3
Bell nonlocality allows secret key to be certified without trusting the internal operation of the devices, and even against eavesdroppers constrained only by the no-signaling princ…
Contextual advantage implies limited distinguishability in any physical theory
Roberto D. Baldijão, Felipe A. Barretto, Jarosław K. Korbicz
A central question in quantum information is whether a given set of states can provide an advantage in some information-processing task. We establish a universal connection between…
How Quantum Contextuality disappears in the Classical Limit
Arthur C. R. Dutra, Roberto D. Baldijão, Marcelo Terra Cunha
The emergence of classicality is fundamentally driven by the interaction between a quantum system and its environment. Foundational open-system approaches, notably the Caldeira-Leg…
Tomographically-nonlocal entanglement
Roberto D. Baldijão, Marco Erba, David Schmid +2
Entanglement is a central and subtle feature of quantum theory, whose structure and operational behavior can change dramatically when additional physical constraints, such as symme…
Typicality of Contextuality
Vinicius P. Rossi, Beata Zjawin, Roberto D. Baldijão +3
Identifying when observed statistics cannot be explained by any reasonable classical model is a central problem in quantum foundations. A principled and universally applicable appr…
A structure theorem for complex-valued quasiprobability representations of physical theories
Rafael Wagner, Roberto D. Baldijão, Matthias Salzger +3
Quasiprobability representations are well-established tools in quantum information science, with applications ranging from the classical simulability of quantum computation to quan…
Shadows and subsystems of generalized probabilistic theories: when tomographic incompleteness is not a loophole for contextuality proofs
David Schmid, John H. Selby, Vinicius P. Rossi +2
It is commonly believed that failures of tomographic completeness undermine assessments of nonclassicality in noncontextuality experiments. In this work, we study how such failures…
Noncontextuality inequalities for prepare-transform-measure scenarios
David Schmid, Roberto D. Baldijão, John H. Selby +2
We provide the first systematic technique for deriving witnesses of contextuality in prepare-transform-measure scenarios. More specifically, we show how linear quantifier eliminati…
Robustness of contextuality under different types of noise as quantifiers for parity-oblivious multiplexing tasks
Amanda M. Fonseca, Vinicius P. Rossi, Roberto D. Baldijão +2
Generalised contextuality is the notion of nonclassicality powering up a myriad of quantum tasks, among which is the celebrated case of a two-party information processing task wher…
Quantum switch instabilities with an open control
Otavio A. D. Molitor, André H. A. Malavazi, Roberto Dobal Baldijão +3
The superposition of causal order shows promise in various quantum technologies. However, the fragility of quantum systems arising from environmental interactions, leading to dissi…
Kirkwood-Dirac representations beyond quantum states (and their relation to noncontextuality)
David Schmid, Roberto D. Baldijão, Yìlè Yīng +2
Kirkwood-Dirac representations of quantum states are increasingly finding use in many areas within quantum theory. Usually, representations of this sort are only applied to provide…
Can multiple observers detect KS-contextuality?
Arthur C. R. Dutra, Roberto D. Baldijão, Marcelo Terra Cunha
KS-contextuality is a crucial feature of quantum theory. Previous research demonstrated the vanishing of -cycle KS-contextuality in setups where multiple independent observers m…
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…
Using a resource theoretic perspective to witness and engineer quantum generalized contextuality for prepare-and-measure scenarios
Rafael Wagner, Roberto D. Baldijão, Alisson Tezzin +1
We employ the resource theory of generalized contextuality as a tool for analyzing the structure of prepare-and-measure scenarios. We argue that this framework simplifies proofs of…
Angular spectrum influence and entanglement characterization of Gaussian-path encoded photonic qudits
Gilberto F. Borges, Roberto D. Baldijão, Artur A. Matoso +1
Entangled quantum states play an important role in quantum information science and also in quantum mechanics fundamental investigations. Implementation and characterization of tech…
Quantum Darwinism and the spreading of classical information in non-classical theories
Roberto D. Baldijao, Marius Krumm, Andrew J. P. Garner +1
Quantum Darwinism posits that the emergence of a classical reality relies on the spreading of classical information from a quantum system to many parts of its environment. But what…
Classical Limits and Contextuality in a Scenario of Multiple Observers
Roberto D. Baldijao, Marcelo Terra Cunha
Contextuality is regarded as a non-classical feature, challenging our everyday intuition; quantum contextuality is currently seen as a resource for many applications in quantum com…
Proposal for Automated Operations for Single-Photon Multipath Qudits
Roberto D. Baldijão, Gilberto F. Borges, Breno Marques +3
We propose a method for implementing automated state transformations on single-photon multipath qudits encoded in a one-dimensional transverse spatial domain. It relies on transfer…