Entangling power of baker's map: Role of symmetries

Details Entangling power of baker's map: Role of symmetries Entangling power of baker's map: Role of symmetries

2006-03-28

arxiv.org/abs/quant-ph/0603261v2

Physics

Quantum Physics

5 pages

Scientific paper

10.1103/PhysRevA.73.052327

The quantum baker map possesses two symmetries: a canonical "spatial" symmetry, and a time-reversal symmetry. We show that, even when these features are taken into account, the asymptotic entangling power of the baker's map does not always agree with the predictions of random matrix theory. We have verified that the dimension of the Hilbert space is the crucial parameter which determines whether the entangling properties of the baker are universal or not. For power-of-two dimensions, i.e., qubit systems, an anomalous entangling power is observed; otherwise the behavior of the baker is consistent with random matrix theories. We also derive a general formula that relates the asymptotic entangling power of an arbitrary unitary with properties of its reduced eigenvectors.

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