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In quantum mechanics, and especially quantum information theory, the purity of a normalized quantum state is a scalar defined as where is the density matrix of the state. The purity defines a measure on quantum states, giving information on how much a state is mixed.

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  • La puresa o purea en mecànica quàntica és un escalar definit com on és la matriu densitat de l'estat. La puresa pot anar entre a unitat, corresponent a un estat completament pur, i , corresponent a un estat completament mesclat. (Aquí, és la dimensió de la densitat de matriu.) La puresa està trivialment relacionada amb l'entropia linear d'un estat per (ca)
  • In quantum mechanics, and especially quantum information theory, the purity of a normalized quantum state is a scalar defined as where is the density matrix of the state. The purity defines a measure on quantum states, giving information on how much a state is mixed. (en)
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  • La puresa o purea en mecànica quàntica és un escalar definit com on és la matriu densitat de l'estat. La puresa pot anar entre a unitat, corresponent a un estat completament pur, i , corresponent a un estat completament mesclat. (Aquí, és la dimensió de la densitat de matriu.) La puresa està trivialment relacionada amb l'entropia linear d'un estat per (ca)
  • In quantum mechanics, and especially quantum information theory, the purity of a normalized quantum state is a scalar defined as where is the density matrix of the state. The purity defines a measure on quantum states, giving information on how much a state is mixed. (en)
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  • Puresa (mecànica quàntica) (ca)
  • Purity (quantum mechanics) (en)
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