Quantum and Linear-Optical Computation group @INL @QLOC_INL
QLOC research group at @INLnano. We work on foundations of quantum computation, photonic QC, and quantum software engineering. @[email protected] inl.int/quantum-and-li… Braga, Portugal Joined June 2022-
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New preprint out! By @efgalvao and collaborators from UFF in Brazil. They measure overlaps of classical states of a light beam featuring fractional OAM states. They use overlap inequalities to witness dimension and coherence in this classical setting. arxiv.org/abs/2509.13275
New @QLOC_INL preprint! Rafael Wagner and collaborators from Gdansk and Waterloo extend the framework of generalized probabilistic theories to describe general complex-valued quasiprobability representations. Congrats! arxiv.org/abs/2509.10949
New QLOC group paper published by Alexandra Ramôa and Luís Paulo Santos. They develop a new algorithm for amplitude estimation, with advantage in noisy scenarios, and accompanying open-source software. Congrats! quantum-journal.org/papers/q-2025-…
New @QLOC_INL paper out! Leonardo Novo (INL) and Michael Jabbour (Brussels) look at the complexity of CV states in linear-optical devices, describing how it increases when nonlinear gates are introduced. Congrats! @phoqusing iopscience.iop.org/article/10.108…
New @QLOC_INL paper out! Rafael Wagner and collaborators show that a Wigner's friend argument can be made having contextuality rather than nonlocality at its core, extending our understanding of the measurement problem. Congrats Rafael! journals.aps.org/pra/abstract/1…
@QLOC_INL members presented their research this week at the IX Paraty Quantum Information Workshop in Brazil. Sara Franco (pictured), Wagner Balthazar, Pedro Azado, and @efgalvao presented talks and posters. Sea, sun, and quantum! 2025.paratyquantum.org/2025/
New preprint by Alexandra Ramôa, Luís Paulo Santos, and Akihito Soeda. They propose a novel Hamiltonian learning algorithm with reliable performance against other low cost methods, especially in the presence of decoherence. Congrats! @EPIQUEquantum arxiv.org/abs/2508.07120
New @QLOC_INL paper published! This is a study on the role of contextuality in a Wigner's friend scenario, designed to study the measurement problem in quantum mechanics. Joint work of Laurens Walleghem, Rafael Wagner, and colleagues from Canada. Congrats! quantum-journal.org/papers/q-2025-…
New @QLOC_INL preprint! We show processes featuring indefinite causal order (switches) can be used to measure and use unitary invariants for applications. Congrats Pedro Azado, Rafael Wagner, @ruisb and @efgalvao! @foqacia_org @INLnano scirate.com/arxiv/2508.023…
New @QLOC_INL paper out! We use a tunable interferometer to do variationally learn near-optimal quantum cloning machines. Collaboration with @FabioSciarrino's group, @fastgroup_ifn, Mina Doosti, Sebastià Nicolau. opg.optica.org/opticaq/fullte…
New @QLOC_INL group preprint! Rafael Wagner, together with Li (South China U.) and Zhang (Hangzhou Dianzi U.) investigate the characterization of quantum imaginarity using Bargmann invariants. Congrats Rafael!arxiv.org/abs/2507.14878
New @QLOC_INL preprint! Alexandra Ramôa, Gilberto Cunha, André Sequeira, Michael de Oliveira and Luís Soares Barbosa propose a Bayesian quantum-enhanced reinforcement learning algorithm, showing the potential for quantum advantage. Congrats! @INLnano arxiv.org/abs/2507.18606
New @QLOC_INL paper published in Linear Algebra and Applications! It describes how the quantum theory of photonic indistinguishability is linked to counter-examples to mathematical conjectures on permanents. Congrats Leonardo, Benoît and colleagues! sciencedirect.com/science/articl…
New @QLOC_INL preprint! Laurens Walleghem (@INLnano, Univ. York) discusses how black-hole physics and the measurement problem play out in Wigner's friend scenarios. Congrats Laurens! arxiv.org/abs/2507.05369
New @QLOC_INL preprint! INL's Alexandra Ramôa, together with Raffaele Santagati and Nathan Wiebe propose robust Bayesian methods for quantum device calibration. Congrats Alexandra! @INLnano arxiv.org/abs/2507.06941
New @QLOC_INL paper out in PRA about validation techniques for Gaussian boson sampling based on detector binning! This is joint work of Leonardo Novo and Benoît Seron with colleagues from Imperial College and Brussels. Congrats! @INLnano @phoqusing journals.aps.org/pra/abstract/1…
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