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Entanglement swapping of noisy states: A kind of superadditivity in nonclassicality
Aditi Sen De, Ujjwal Sen, Caslav Brukner +2
We address the question as to whether an entangled state that satisfies local realism will give a violation of the same, after entanglement swapping in a suitable scenario. We cons…
Cloning of orthogonal mixed states entails irreversibility
Michal Horodecki, Aditi Sen De, Ujjwal Sen
Orthogonal pure states can be cloned as well as deleted. However if there is an initial disorder in the system, that is for orthogonal mixed states, one cannot perform deletion. An…
Quantification of quantum correlation of ensemble of states
Michal Horodecki, Aditi Sen De, Ujjwal Sen
We present first measure of quantum correlation of an ensemble of multiparty states. It is based on the idea of minimal entropy production in a locally distinguishable basis measur…
No-deleting and no-cloning principles as consequences of conservation of quantum information
Michal Horodecki, Ryszard Horodecki, Aditi Sen De +1
We show that the no-deleting and no-cloning principles are implications of information conservation principle. This is unlike in classical physics, where cloning and deleting are p…
Output state in multiple entanglement swapping
Aditi Sen De, Ujjwal Sen, Marek Zukowski
The technique of quantum repeaters is a promising candidate for sending quantum states over long distances through a lossy channel. The usual discussions of this technique deals wi…
Locally accessible information: How much can the parties gain by cooperating?
Piotr Badziag, Michal Horodecki, Aditi Sen De +1
We investigate measurements of bipartite ensembles restricted to local operations and classical communication and find a universal Holevo-like upper bound on the locally accessible…