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In physics, the no-deleting theorem of quantum information theory is a no-go theorem which states that, in general, given two copies of some arbitrary quantum state, it is impossible to delete one of the copies. It is a time-reversed dual to the no-cloning theorem, which states that arbitrary states cannot be copied. This theorem seems remarkable, because, in many senses, quantum states are fragile; the theorem asserts that, in a particular case, they are also robust. Physicist Arun K. Pati along with Samuel L. Braunstein proved this theorem.

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  • In physics, the no-deleting theorem of quantum information theory is a no-go theorem which states that, in general, given two copies of some arbitrary quantum state, it is impossible to delete one of the copies. It is a time-reversed dual to the no-cloning theorem, which states that arbitrary states cannot be copied. This theorem seems remarkable, because, in many senses, quantum states are fragile; the theorem asserts that, in a particular case, they are also robust. Physicist Arun K. Pati along with Samuel L. Braunstein proved this theorem. The no-deleting theorem, together with the no-cloning theorem, underpin the interpretation of quantum mechanics in terms of category theory, and, in particular, as a dagger symmetric monoidal category. This formulation, known as categorical quantum mechanics, in turn allows a connection to be made from quantum mechanics to linear logic as the logic of quantum information theory (in exact analogy to classical logic being founded on Cartesian closed categories). (en)
  • Zakaz usuwania (ang. no-deleting theorem) – twierdzenie mówiące, że mając dwie kopie nieznanego stanu kwantowego nie można usunąć jednej z nich. Jest dopełnieniem zakazu klonowania, zgodnie z którym nie można skopiować nieznanego stanu kwantowego, jak i zakazu ukrywania, zgodnie z którym informacja kwantowa usunięta z systemu kwantowego do środowiska nie może pozostawać w korelacji pomiędzy systemem a środowiskiem. (pl)
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  • Zakaz usuwania (ang. no-deleting theorem) – twierdzenie mówiące, że mając dwie kopie nieznanego stanu kwantowego nie można usunąć jednej z nich. Jest dopełnieniem zakazu klonowania, zgodnie z którym nie można skopiować nieznanego stanu kwantowego, jak i zakazu ukrywania, zgodnie z którym informacja kwantowa usunięta z systemu kwantowego do środowiska nie może pozostawać w korelacji pomiędzy systemem a środowiskiem. (pl)
  • In physics, the no-deleting theorem of quantum information theory is a no-go theorem which states that, in general, given two copies of some arbitrary quantum state, it is impossible to delete one of the copies. It is a time-reversed dual to the no-cloning theorem, which states that arbitrary states cannot be copied. This theorem seems remarkable, because, in many senses, quantum states are fragile; the theorem asserts that, in a particular case, they are also robust. Physicist Arun K. Pati along with Samuel L. Braunstein proved this theorem. (en)
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  • No-deleting theorem (en)
  • Zakaz usuwania (pl)
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