Optimal purification of single qubits

Details Optimal purification of single qubits Optimal purification of single qubits

1998-12-26

arxiv.org/abs/quant-ph/9812075v1

Phys.Rev.Lett. 82 (1999) 4344-4347

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.82.4344

We introduce a new decomposition of the multiqubit states of the form
$\rho^{\otimes N}$ and employ it to construct the optimal single qubit
purification procedure. The same decomposition allows us to study optimal
quantum cloning and state estimation of mixed states.

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