Year: 2002
Type: article
Abstract: We estimate an unknown qubit from the long sequence of n random polarization measurements of precision Δ. Using the standard Ito stochastic equations of the a posteriori state in the continuous measurement limit, we calculate the advancement of fidelity. We show that the standard optimum value 2/3 is achieved asymptotically for n ≫ Δ 2 /96 ≫ 1. We append a brief derivation of novel Ito equations for the estimate state.
Author: Lajos Diósi
Institution: Institute for Particle and Nuclear Physics
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2080493333