Enhanced coherent dynamics near a transition between neutral quantum-paraelectric and ionic ferroelectric phases in the quantum Blume-Emery-Griffiths model

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dc.creatorYonemitsu, Kenji
dc.date2008-10-11
dc.date.accessioned2026-07-07T13:08:17Z
dc.date.available2026-07-07T13:08:17Z
dc.descriptionNonequilibrium dynamics are studied near the quantum phase transition point in the one-dimensional quantum Blume-Emery-Griffiths model. Its pseudo-spin component $ S^z $ represents an electric polarization, and $ (S^z)^2 $ corresponds to ionicity, in mixed-stack charge-transfer complexes that exhibit a transition between neutral quantum-paraelectric and ionic ferroelectric (or antiferroelectric) phases. The time-dependent Schrödinger equation is solved for the exact many-body wave function in the quantum paraelectric phase. After impact force is introduced on a polarization locally in space and time, polarizations and ionicity coherently oscillate. The oscillation amplitudes are large near the quantum phase transition point. The energy supplied by the impact flows linearly into these oscillations, so that the nonequilibrium behavior is uncooperative.
dc.description6 pages, 4 figures, accepted for publication in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/0810.1993
dc.identifierhttp://arxiv.org/abs/0810.1993
dc.identifierPhys. Rev. B 78, 205102 (2008)
dc.identifierdoi:10.1103/PhysRevB.78.205102
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228369
dc.subjectStrongly Correlated Electrons
dc.titleEnhanced coherent dynamics near a transition between neutral quantum-paraelectric and ionic ferroelectric phases in the quantum Blume-Emery-Griffiths model
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