On the Connection Between Entanglement and the Speed of Quantum Evolution

Details On the Connection Between Entanglement and the Speed of Quantum Evolution On the Connection Between Entanglement and the Speed of Quantum Evolution

2005-07-04

arxiv.org/abs/quant-ph/0507030v1

Physical Review A 72, 032337 (2005)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.72.032337

It has been recently pointed out [V. Giovanetti, S. Lloyd, and L. Maccone, Europhys. Lett., {\bf 62} pp. 615-621 (2003)] that, for certain classes of states, quantum entanglement enhances the "speed" of evolution of composite quantum systems, as measured by the time a given initial state requires to evolve to an orthogonal state. We provide here a systematic study of this effect for pure states of bipartite systems of low dimensionality, considering both distinguishable (two-qubits) subsystems, and systems constituted of two indistinguishable particles.

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