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4 papers · 2 filters
Combinatorial Physics, Normal Order and Model Feynman Graphs
A. I. Solomon, P. Blasiak, G. Duchamp +2
The general normal ordering problem for boson strings is a combinatorial problem. In this note we restrict ourselves to single-mode boson monomials. This problem leads to elegant g…
Entanglement preservation in quantum cloning
Paweł Masiak
Recently Galvão and Hardy have shown that quantum cloning can improve the performance of some quantum computation tasks. However such performance enhancement is possible only if qu…
On entanglement at tripartite states
S. Bugajski, J. A. Miszczak
Article presents general formulation of entanglement measures problem in terms of correlation function. Description of entanglement in probabilistic framework allow us to introduce…
Entanglement and classical correlations in the quantum frame
E. G. Beltrametti, S. Bugajski
The frame of classical probability theory can be generalized by enlarging the usual family of random variables in order to encompass nondeterministic ones: this leads to a frame in…