Relaxational behavior of the infinite-range Ising spin-glass in a transverse field

Details Relaxational behavior of the infinite-range Ising spin-glass in a transverse field Relaxational behavior of the infinite-range Ising spin-glass in a transverse field

1996-03-02

arxiv.org/abs/cond-mat/9603012v1

Physics

Condensed Matter

15 pages + 5 Figures, Revtex

Scientific paper

10.1088/0305-4470/29/23/006

We study the zero-temperature behavior of the infinite-ranged Ising spin glass in a transverse field. Using spin summation techniques and Monte Carlo methods we characterize the zero-temperature quantum transition. Our results are well compatible with a value $\nu=\frac{1}{4}$ for the correlation length exponent, $z=4$ for the dynamical exponent and an algebraic decay $t^{-1}$ for the imaginary-time correlation function. The zero-temperature relaxation of the energy in the presence of the transverse field shows that the system monotonically reaches the ground state energy due to tunneling processes and displays strong glassy effects.

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