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Showing 2004 · quant-phShow all
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quant-ph2004★ 51 cited
Operational distance and fidelity for quantum channels
Viacheslav P. Belavkin, Giacomo Mauro D'Ariano, Maxim Raginsky
We define and study a fidelity criterion for quantum channels, which we term the minimax fidelity, through a noncommutative generalization of maximal Hellinger distance between two…
quant-ph2004★ 65 cited
Bellman equations for optimal feedback control of qubit states
Luc Bouten, Simon Edwards, V P Belavkin
Using results from quantum filtering theory and methods from classical control theory, we derive an optimal control strategy for an open two-level system (a qubit in interaction wi…