On the distribution of entanglement changes produced by unitary operations

Details On the distribution of entanglement changes produced by unitary operations On the distribution of entanglement changes produced by unitary operations

2006-03-07

arxiv.org/abs/quant-ph/0603057v1

Physics Letters A 307, 253 (2003)

Physics

Quantum Physics

Scientific paper

10.1016/S0375-9601(02)01665-1

We consider the change of entanglement of formation $\Delta E$ produced by a unitary transformation acting on a general (pure or mixed) state $\rho$ describing a system of two qubits. We study numerically the probabilities of obtaining different values of $\Delta E$, assuming that the initial state is randomly distributed in the space of all states according to the product measure introduced by Zyczkowski {\it et al.} [Phys. Rev. A {\bf 58} (1998) 883].

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