Optimal phase estimation for qubit mixed states

Abstract

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.

revised version accepted for publication

Cited by in corpus (11)

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• General quantum phase estimation and calibration of a timepiece in a quantum dot system
• Quantum interferometry at zero and finite temperature with two-mode bosonic Josephson junctions
• Noisy initial-state qubit-channel metrology with additional undesirable noisy evolution