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22 papers · 2 filters
Genuine quantum correlations in quantum many-body systems: a review of recent progress
Gabriele De Chiara, Anna Sanpera
Quantum information theory has considerably helped in the understanding of quantum many-body systems. The role of quantum correlations and in particular, bipartite entanglement, ha…
Approximating quantum channels by completely positive maps with small Kraus rank
Cécilia Lancien, Andreas Winter
We study the problem of approximating a quantum channel by one with as few Kraus operators as possible (in the sense that, for any input state, the output states of the two channel…
Measurements in two bases are sufficient for certifying high-dimensional entanglement
Jessica Bavaresco, Natalia Herrera Valencia, Claude Klöckl +5
High-dimensional encoding of quantum information provides a promising method of transcending current limitations in quantum communication. One of the central challenges in the purs…
Coherence and non-classicality of quantum Markov processes
Andrea Smirne, Dario Egloff, María García Díaz +2
Although quantum coherence is a basic trait of quantum mechanics, the presence of coherences in the quantum description of a certain phenomenon does not rule out the possibility to…
Entanglement scaling at first order phase transitions
A. Yuste, C. Cartwright, G. De Chiara +1
First order quantum phase transitions (1QPTs) are signaled, in the thermodynamic limit, by discontinuous changes in the ground state properties. These discontinuities affect expect…
Duality games and operational duality relations
Emilio Bagan, John Calsamiglia, Janos A. Bergou +1
We give operational meaning to wave-particle duality in terms of discrimination games. Duality arises as a constraint on the probability of winning these games. The games are playe…