In probability theory, to postselect is to condition a probability space upon the occurrence of a given event. In symbols, once we postselect for an event , the probability of some other event changes from to the conditional probability . For a discrete probability space, , and thus we require that be strictly positive in order for the postselection to be well-defined. See also PostBQP, a complexity class defined with postselection. Using postselection it seems quantum Turing machines are much more powerful: Scott Aaronson proved PostBQP is equal to PP.
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| - Post-selecció (ca)
- Postselection (en)
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| - En teoria de la probabilitat, la post-selecció és el fet de condicionar un espai de probabilitats a una ocurrència d'un esdeveniment donat. Això és, un cop s'ha post-seleccionat per un esdeveniment , la probabilitat d'un altre esdeveniment canvia de cap a la probabilitat condicional . Per una probabilitat discreta, , i per tant es requereix que sigui estrictament positiu per tenir ben definida la post-selecció. Alguns experiments quàntics utilitzen post-selecció després de l'experiment enlloc de la comunicació durant l'experiment, post-seleccionant el valor comunicat en una constant. (ca)
- In probability theory, to postselect is to condition a probability space upon the occurrence of a given event. In symbols, once we postselect for an event , the probability of some other event changes from to the conditional probability . For a discrete probability space, , and thus we require that be strictly positive in order for the postselection to be well-defined. See also PostBQP, a complexity class defined with postselection. Using postselection it seems quantum Turing machines are much more powerful: Scott Aaronson proved PostBQP is equal to PP. (en)
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| - En teoria de la probabilitat, la post-selecció és el fet de condicionar un espai de probabilitats a una ocurrència d'un esdeveniment donat. Això és, un cop s'ha post-seleccionat per un esdeveniment , la probabilitat d'un altre esdeveniment canvia de cap a la probabilitat condicional . Per una probabilitat discreta, , i per tant es requereix que sigui estrictament positiu per tenir ben definida la post-selecció. Alguns experiments quàntics utilitzen post-selecció després de l'experiment enlloc de la comunicació durant l'experiment, post-seleccionant el valor comunicat en una constant. (ca)
- In probability theory, to postselect is to condition a probability space upon the occurrence of a given event. In symbols, once we postselect for an event , the probability of some other event changes from to the conditional probability . For a discrete probability space, , and thus we require that be strictly positive in order for the postselection to be well-defined. See also PostBQP, a complexity class defined with postselection. Using postselection it seems quantum Turing machines are much more powerful: Scott Aaronson proved PostBQP is equal to PP. Some quantum experiments use post-selection after the experiment as a replacement for communication during the experiment, by post-selecting the communicated value into a constant. (en)
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