J
John Calsamiglia
Researcher at Autonomous University of Barcelona
Publications - 88
Citations - 3370
John Calsamiglia is an academic researcher from Autonomous University of Barcelona. The author has contributed to research in topics: Quantum entanglement & Qubit. The author has an hindex of 25, co-authored 84 publications receiving 2913 citations. Previous affiliations of John Calsamiglia include IFAE & University of Innsbruck.
Papers
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Discriminating States: the quantum Chernoff bound.
Kmr Audenaert,John Calsamiglia,Ramon Muñoz-Tapia,Emilio Bagan,Ll. Masanes,Antonio Acín,Frank Verstraete +6 more
TL;DR: The problem of discriminating two different quantum states in the setting of asymptotically many copies is considered, and the minimal probability of error is determined, leading to the identification of the quantum Chernoff bound, thereby solving a long-standing open problem.
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Bell measurements for teleportation
TL;DR: In this article, the authors investigated the possibility of making complete Bell measurements on a product Hilbert space of two two-level bosonic systems, and they restricted their tools to linear elements, such as beam splitters and phase shifters, delay lines and electronically switched linear elements.
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Computable measure of nonclassicality for light.
TL;DR: The entanglement potential detects nonclassicality, has a direct physical interpretation, and can be computed efficiently, which make it stand out from previously proposed non classicality measures.
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Maximum efficiency of a linear-optical Bell-state analyzer
TL;DR: It is shown that within this subclass of tools, namely linear-optical elements and auxiliary modes in the vacuum state, it is not possible to discriminate unambiguously four equiprobable Bell states with a probability higher than 50%.
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All nonclassical correlations can be activated into distillable entanglement.
Marco Piani,Sevag Gharibian,Gerardo Adesso,John Calsamiglia,Paweł Horodecki,Andreas Winter,Andreas Winter +6 more
TL;DR: A protocol in which general nonclassical multipartite correlations produce a physically relevant effect, leading to the creation of bipartite entanglement, emphasizing the key role of state mixedness in maximizing non classicality.