Optimal phase estimation for qubit mixed states

Details Optimal phase estimation for qubit mixed states Optimal phase estimation for qubit mixed states

2004-11-18

arxiv.org/abs/quant-ph/0411133v3

Phys. Rev. A 72 042327 (2005)

Physics

Quantum Physics

revised version accepted for publication

Scientific paper

10.1103/PhysRevA.72.042327

We address the problem of optimal estimation of the relative phase for
two-dimensional quantum systems in mixed states. In particular, we derive the
optimal measurement procedures for an arbitrary number of qubits prepared in
the same mixed state.

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