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- W2952357895 abstract "Nonlocal two-qubit quantum gates are represented by canonical decomposition or equivalently by operator-Schmidt decomposition. The former decomposition results in geometrical representation such that all the two-qubit gates form tetrahedron within which perfect entanglers form a polyhedron. On the other hand, it is known from the later decomposition that Schmidt number of nonlocal gates can be either 2 or 4. In this work, some aspects of later decomposition are investigated. It is shown that two gates differing by local operations possess same set of Schmidt coefficients. Employing geometrical method, it is established that Schmidt number 2 corresponds to controlled unitary gates. Further, all the edges of tetrahedron and polyhedron are characterized using Schmidt strength, a measure of operator entanglement. It is found that one edge of the tetrahedron possesses the maximum Schmidt strength, implying that all the gates in the edge are maximally entangled." @default.
- W2952357895 created "2019-06-27" @default.
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- W2952357895 date "2010-06-17" @default.
- W2952357895 modified "2023-09-26" @default.
- W2952357895 title "Operator-Schmidt decomposition and the geometrical edges of two-qubit gates" @default.
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- W2952357895 doi "https://doi.org/10.48550/arxiv.1006.3412" @default.
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