Temperature shifts in the quantum spherical p-spin model of glass

Buziello, G.; Gazeeva, E. V.; Saburova, R. V.; Khaibutdinova, I. R.; Chugunova, G. P.

doi:10.1134/s0031918x06020025

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…The dynamic behavior of glassy systems exposed to an external disturbing force is much less studied [4]. In this case, the behavior of the correlation, response, and susceptibility functions is changed; aging can be interrupted or even terminated [6,7]. In particular, the dependence ( ) C χ takes the form of a broken line or even a more complicated form, which testifies to a dramatic violation of FDT, when no effective temperature can be determined.…”

Section: Introductionmentioning

confidence: 99%

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Low-temperature dynamic behavior of a spherical p-spin model of glass in an alternating field

et al. 2004

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537.611.2Coupled dynamic Schwinger-Dyson equations for autocorrelation and linear-response functions are used for studying nonequilibrium dynamics of a p-spin model of glass. The numerical solution of these equations reveals an interesting dynamic behavior of the system in the external alternating field. The behavior is also shown to depend on the amplitude and frequency of the foregoing field and on the value of coupling between the spins.

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Section: Introductionmentioning

confidence: 99%

“…Currently investigations into the behavior of compound systems, such as glassy ones, are of great interest [1][2][3][4][5][6][7]. Glassy systems (glasses, spin glasses, etc.)…”

Section: Introductionmentioning

confidence: 99%

Low-temperature dynamic behavior of a spherical p-spin model of glass in an alternating field

et al. 2004

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Nonequilibrium dynamic effects (aging, rejuvenation, and memory) in one-dimensional classical spin chains

Buziello¹,

Saburova

Gazeeva

et al. 2008

Russ Phys J

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The nonequilibrium low-temperature dynamics of the one-dimensional classical Ising spin chain in a chaotic field is investigated analytically and numerically. Special attention is given to the effects of rejuvenation and memory. Aging in several time regimes characterized by different properties is established. Astonishing rejuvenation and memory effects for the dynamic susceptibility are first considered by means of studying temperature jumps and cycles. These effects are briefly analyzed. A comparison with other models of disordered systems is made.

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Coarsening of disordered quantum rotors under a bias voltage

2010

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We solve the dynamics of an ensemble of interacting rotors coupled to two leads at different chemical potential letting a current flow through the system and driving it out of equilibrium. We show that at low temperature the coarsening phase persists under the voltage drop up to a critical value of the applied potential that depends on the characteristics of the electron reservoirs. We discuss the properties of the critical surface in the temperature, voltage, strength of quantum fluctuations, and coupling to the bath phase diagram. We analyze the coarsening regime finding, in particular, which features are essentially quantum mechanical and which are basically classical in nature. We demonstrate that the system evolves via the growth of a coherence length with the same time dependence as in the classical limit, R(t) ≃ t 1/2 -the scalar curvature driven universality class. We obtain the scaling function of the correlation function at late epochs in the coarsening regime and we prove that it coincides with the classical one once a prefactor that encodes the dependence on all the parameters is factorized. We derive a generic formula for the current flowing through the system and we show that, for this model, it rapidly approaches a constant that we compute.

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Temperature shifts in the quantum spherical p-spin model of glass

Cited by 3 publications

References 20 publications

Low-temperature dynamic behavior of a spherical p-spin model of glass in an alternating field

Low-temperature dynamic behavior of a spherical p-spin model of glass in an alternating field

Nonequilibrium dynamic effects (aging, rejuvenation, and memory) in one-dimensional classical spin chains

Coarsening of disordered quantum rotors under a bias voltage

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