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5 papers · 2 filters
Entanglement and the Lower Bounds on the Speed of Quantum Evolution
A. Borrás, M. Casas, A. R. Plastino +1
The concept of quantum speed limit-time (QSL) was initially introduced as a lower bound to the time interval that a given initial state may need so as to evolve into a state…
Improving the Convergence of an Iterative Algorithm Proposed By Waxman
W. A. Berger, H. G. Miller
In the iterative algorithm recently proposed by Waxman for solving eigenvalue problems, we point out that the convergence rate may be improved. For many non-singular symmetric pote…
Entanglement Distribution and Entangling Power of Quantum Gates
J. Batle, M. Casas, A. Plastino +1
Quantum gates, that play a fundamental role in quantum computation and other quantum information processes, are unitary evolution operators that act on a composite system…
Maximally Entangled Mixed States and Conditional Entropies
J. Batle, M. Casas, A. Plastino +1
The maximally entangled mixed states of Munro, James, White, and Kwiat [Phys. Rev. A {\bf 64} (2001) 030302] are shown to exhibit interesting features vis a vis conditional entropi…
Werner states and the two-spinors Heisenberg anti-ferromagnet
J. Batle, M. Casas, A. Plastino +1
We ascertain, following ideas of Arnesen, Bose, and Vedral concerning thermal entanglement [Phys. Rev. Lett. {\bf 87} (2001) 017901] and using the statistical tool called {\it entr…