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11 papers · 2 filters
Mutually unbiased bases and symmetric informationally complete measurements in Bell experiments
Armin Tavakoli, Máté Farkas, Denis Rosset +2
Mutually unbiased bases (MUBs) and symmetric informationally complete projectors (SICs) are crucial to many conceptual and practical aspects of quantum theory. Here, we develop the…
Positive Maps From Irreducibly Covariant Operators
Piotr Kopszak, Marek Mozrzymas, Michał Studziński
In this paper, we discuss positive maps induced by (irreducibly) covariant linear operators for finite groups. The application of group theory methods allows deriving some new resu…
Activating hidden metrological usefulness
Géza Tóth, Tamás Vértesi, Paweł Horodecki +1
We consider bipartite entangled states that cannot outperform separable states in any linear interferometer. Then, we show that these states can still be more useful metrologically…
Quantum error correction codes and absolutely maximally entangled states
Paweł Mazurek, Máté Farkas, Andrzej Grudka +2
For every stabiliser -qudit absolutely maximally entangled state, we present a method for determining the stabiliser generators and logical operators of a corresponding quantum…
Quantum prescriptions are more ontologically distinct than they are operationally distinguishable
Anubhav Chaturvedi, Debashis Saha
Based on an intuitive generalization of the Leibniz principle of `the identity of indiscernibles', we introduce a novel ontological notion of classicality, called bounded ontologic…
Quantum marginal problem and incompatibility
Erkka Haapasalo, Tristan Kraft, Nikolai Miklin +1
One of the basic distinctions between classical and quantum mechanics is the existence of fundamentally incompatible quantities. Such quantities are present on all levels of quantu…