منابع مشابه
Quantum Perfect Correlations *
The notion of perfect correlations between arbitrary observables, or more generally arbitrary POVMs, is introduced in the standard formulation of quantum mechanics, and characterized by several well-established statistical conditions. The transitivity of perfect correlations is proved to generally hold, and applied to a simple articulation for the failure of Hardy’s nonlocality proof for maxima...
متن کاملperfect correlations ∗
The notion of perfect correlations between arbitrary observables, or more generally arbitrary POVMs, is introduced in the standard formulation of quantum mechanics, and characterized by several well-established statistical conditions. The transitivity of perfect correlations is proved to generally hold, and applied to a simple articulation for the failure of Hardy’s nonlocality proof for maxima...
متن کاملPerfect Quantum Error Correcting Code.
We present a quantum error correction code which protects a qubit of information against general one qubit errors which maybe caused by the interaction with the environment. To accomplish this, we encode the original state by distributing quantum information over five qubits, the minimal number required for this task. We give a simple circuit which takes the initial state with four extra qubits...
متن کاملNo More Perfect Codes: Classification of Perfect Quantum Codes
We solve the problem of the classification of perfect quantum codes. We prove that the only nontrivial perfect quantum codes are those with the parameters ( ( 2 2 2 ( 1) ( 1) , ,3 l n q q q q − − − )) l . There exist no other nontrivial perfect quantum codes.
متن کاملStronger-Than-Quantum Correlations
After an elementary derivation of Bell’ s inequality, classical, quantum mechanical , and stronger-than-quantum correlation functions for 2-particle-systems are discussed. Special functions are investigated which give rise to an extreme violation of Bell’ s inequality by the value of 4. Referring to a specific quantum system it is shown that under certain conditions such an extreme violation wo...
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ژورنال
عنوان ژورنال: Annals of Physics
سال: 2006
ISSN: 0003-4916
DOI: 10.1016/j.aop.2005.08.007