Entangling power of the quantum baker's map

Details Entangling power of the quantum baker's map Entangling power of the quantum baker's map

2003-05-08

arxiv.org/abs/quant-ph/0305046v2

J. Phys. A 36, 9553 (2003)

Physics

Quantum Physics

22 pages, 11 figures

Scientific paper

10.1088/0305-4470/36/36/308

We investigate entanglement production in a class of quantum baker's maps. The dynamics of these maps is constructed using strings of qubits, providing a natural tensor-product structure for application of various entanglement measures. We find that, in general, the quantum baker's maps are good at generating entanglement, producing multipartite entanglement amongst the qubits close to that expected in random states. We investigate the evolution of several entanglement measures: the subsystem linear entropy, the concurrence to characterize entanglement between pairs of qubits, and two proposals for a measure of multipartite entanglement. Also derived are some new analytical formulae describing the levels of entanglement expected in random pure states.

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