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- W2046012287 abstract "The Dirac-matrix representation of a general two-qubit system is shown to exhibit quite interesting features. The relativistic symmetries of time reversal T, charge conjugation C, parity P, and their products are reinterpreted here by examining their action on the Bell states. It is shown that only C does not mix the Bell states whereas all others do. The various logic gates of quantum information theory are also expressed in terms of the Dirac matrices. For example, the NOT gate is related to the product of T and P. A two-qubit density matrix is found to be entangled if it is invariant under C." @default.
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- W2046012287 date "2001-07-03" @default.
- W2046012287 modified "2023-09-27" @default.
- W2046012287 title "Two qubits in the Dirac representation" @default.
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- W2046012287 doi "https://doi.org/10.1103/physreva.64.024303" @default.
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