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EnglishWe exhibit a general procedure to purify any given ensemble by identifying an appropriate interaction between the physical system S of the ensemble and the reference system K. We show that the interaction can be chosen in such a way to lead to a spatial separation of the pair S–K. As a consequence, one can use it to prepare at a distance different equivalent ensembles. The argument associates a physically precise procedure to the purely formal and fictitious process usually considered in the literature. We conclude with an illuminating example taken from quantum computational theory.
| Titolo: | A general scheme for ensemble purification |
| Autori: | |
| Data di pubblicazione: | 2003 |
| Rivista: | |
| Abstract: | We exhibit a general procedure to purify any given ensemble by identifying an appropriate interaction between the physical system S of the ensemble and the reference system K. We show that the interaction can be chosen in such a way to lead to a spatial separation of the pair S–K. As a consequence, one can use it to prepare at a distance different equivalent ensembles. The argument associates a physically precise procedure to the purely formal and fictitious process usually considered in the literature. We conclude with an illuminating example taken from quantum computational theory. |
| Handle: | http://hdl.handle.net/11368/1877546 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/S0375-9601(02)01670-5 |
| URL: | http://www.sciencedirect.com/science/article/pii/S0375960102016705 |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |
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http://hdl.handle.net/11368/1877546
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