Wednesday, April 24, 2013

1304.6219 (F. D. Cunden et al.)

Polarized ensembles of random pure states    [PDF]

F. D. Cunden, P. Facchi, G. Florio
A new family of polarized ensembles of random pure states is presented. These ensembles are quite manageable and can be simply obtained from the unitarily invariant measure on the space of states by superposition of pure states. We will use the obtained results for two purposes: on the one hand we will be able to derive an efficient strategy for sampling states from isopurity manifolds. On the other, we will characterize the deviation of a pure quantum state from separability under the influence of noise.
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