Connection between entanglement and the speed of quantum evolution

Journal Article · Thu Sep 15 00:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.72.032337· OSTI ID:20718523

Batle, J; Casas, M ^[1]; Plastino, A ^[2]; Plastino, A R ^[3]

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1. Departament de Fisica, Universitat de les Illes Balears and IMEDEA-CSIC, 07122 Palma de Mallorca (Spain)
2. National University La Plata-CONICET, C.C. 727, 1900 La Plata (Argentina)
3. Department of Physics, University of Pretoria, 0002 Pretoria (South Africa)

It has been recently pointed out [V. Giovannetti, S. Lloyd, and L. Maccone, Europhys. Lett. 62, 615 (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.

• OSTI ID: 20718523
• Journal Information: Physical Review. A, Vol. 72, Issue 3; Other Information: DOI: 10.1103/PhysRevA.72.032337; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ENERGY LEVELS
EVOLUTION
INFORMATION THEORY
QUANTUM COMPUTERS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUBITS
VELOCITY