Dynamical susceptibility of the ising model in a transverse magnetic field |
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Authors: | DL Huber T Tommet |
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Institution: | Brookhaven National Laboratory, Upton, New York 11973, U.S.A.;Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, U.S.A. |
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Abstract: | An approximate expression is obtained for the dynamical susceptibility, χzz(q, ω), of the spin one half, simple cubic Ising model in a transverse magnetic field, which is appropriate to the disordered state (〈Sz〉 = 0). The susceptibility along the direction of the field is shown to contain a thermal part with a relative weight proportional to the difference between the isothermal and adiabatic susceptibilities and a width determined by the thermal diffusion constant. |
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