Priors for quantum states & processes

Priors for quantum states & processes

Update: 2008-08-29
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As became apparent during Koenraad's talk, there are some important subleties to concepts like 'flat prior' and 'uniform distribution'... especially over probability simplices and quantum state spaces. This is a key problem for Bayesian approaches. Perhaps we're more interested in Jeffreys priors, Bures priors, or even something induced by the Chernoff bound! I'd like to start a discussion of the known useful distributions over quantum states & processes, and I nominate Karol Zyckowski to lead it off.
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Priors for quantum states & processes

Priors for quantum states & processes

Karol Zyczkowski