Quantum Information and Many-Body Quantum Systems
timetable:
Fri 30 Mar, 16:30 - 17:00, Aula Dini
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seminar: Entropic information-disturbance tradeoff
speaker: Lorenzo Maccone (QUIT, Università di Pavia)abstract: We show the flaws found in the customary fidelity-based definitions of disturbance in quantum measurements and evolutions. We introduce the "entropic disturbance" D and show that it adequately measures the degree of disturbance, intended essentially as an irreversible change in the state of the system. We also find that it complies with an information--disturbance tradeoff, namely the mutual information between the eigenvalues of the initial state and the measurement results is less than or equal to D.
timetable:
Fri 30 Mar, 16:30 - 17:00, Aula Dini
<< Go back