Order-parameter fluctuations in Ising spin glasses at low temperatures
We present a numerical study of the order-parameter fluctuations for Ising spin glasses in three and four dimensions at very low temperatures and without an external field. Accurate measurements of two previously introduced parameters, A and G, show that the order parameter is not self-averaging, co...
| Authors: | , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2003 |
| Country: | España |
| Institution: | Universidad de Barcelona |
| Repository: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/10920 |
| Online Access: | https://hdl.handle.net/2445/10920 |
| Access Level: | Open access |
| Keyword: | Vidres de spin Temperatures baixes Propietats magnètiques Spin glasses Low temperatures Magnetic properties |
| Summary: | We present a numerical study of the order-parameter fluctuations for Ising spin glasses in three and four dimensions at very low temperatures and without an external field. Accurate measurements of two previously introduced parameters, A and G, show that the order parameter is not self-averaging, consistent with a zero-temperature thermal exponent value \theta' \simeq 0, and confirm the validity of the relation G=1/3 in the thermodynamic limit in the whole low-temperature phase, as predicted by stochastic stability arguments. |
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