Abstract
The special purpose processor for Ising spin systems, which is named the m-TIS, megaspin model of the Tokyo University Ising spin machine, is designed and constructed by the present authors. The m-TIS can treat several millions of Ising spins per second when it is connected to an appropriate host computer. For example, the speeds in the case of square and cubic models are 1.8 and 1.5 million spins/s, respectively. The maximum ability is 107/s. This machine can treat the Ising spin systems having one translation invariant direction in the lattice and having local Hamiltonians, including less than 13 spins–for example, Ising models with external field, ±J spin glasses, and ±H random field models.
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