We address the sensitivity of Bures and Hilbert distances between two qubits in revealing (i) small perturbations occurring to one of the qubits and (ii) small changes of the noise parameter in a noisy channel. A general relation is derived, as well as specific bounds for perturbations induced by relevant noisy quantum channels.
Distances between qubits and sensitivity to perturbations / S. Salvini, S. Olivares, M. G. A. Paris. - In: LASER PHYSICS. - ISSN 1054-660X. - 17:4(2007), pp. 552-558.
Distances between qubits and sensitivity to perturbations
S. OlivaresSecondo
;M. G. A. ParisUltimo
2007
Abstract
We address the sensitivity of Bures and Hilbert distances between two qubits in revealing (i) small perturbations occurring to one of the qubits and (ii) small changes of the noise parameter in a noisy channel. A general relation is derived, as well as specific bounds for perturbations induced by relevant noisy quantum channels.
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