Guessing Quantum Ensemble Using Laplace Principle

Details Guessing Quantum Ensemble Using Laplace Principle Guessing Quantum Ensemble Using Laplace Principle

2009-01-23

arxiv.org/abs/0901.3771v1

Physics

Quantum Physics

11 pages, LaTeX. Talk presented at Quantum Structures - 2008 (July 6-12, 2008, Sopot, Poland)

Scientific paper

For a mixed quantum state with density matrix $\rho$ there are infinitely
many ensembles of pure quantum states, which average to $\rho$. Starting from
Laplace principle of insufficient reason (not to give \emph{a priori}
preference to any particular state), we derive a `natural' distribution of pure
states averaging to $\rho$, which is `more spread' than all the others.

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