Fluctuations of the Magnetization in the p-Spin Curie–Weiss Model
Fluctuations of the Magnetization in the p-Spin Curie–Weiss Model
复制标题
p-自旋居里-韦斯模型中磁化强度的涨落
DOI:
10.1007/s00220-021-04182-z
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发表时间:
2021
影响因子:
2.4
通讯作者:
Bhattacharya, Bhaswar B.
中科院分区:
文献类型:
--
作者:
Mukherjee, Somabha;Son, Jaesung;Bhattacharya, Bhaswar B.
In this paper we consider the problem of parameter estimation in the-spin Curie-Weiss model, for. We provide a complete description of the limiting properties of the maximum likelihood (ML) estimates of the inverse temperature and the magnetic field given a single realization from the-spin Curie-Weiss model, complementing the well-known results in the 2-spin case (Comets and Gidas (1991)). Our results unearth various new phase transitions and surprising limit theorems, such as the existence of a 'critical' curve in the parameter space, where the limiting distribution of the ML estimates is a mixture with both continuous and discrete components. The number of mixture components is either two or three, depending on, among other things, the sign of one of the parameters and the parity of. Another interesting revelation is the existence of certain 'special' points in the parameter space where the ML estimates exhibit a superefficiency phenomenon, converging to a non-Gaussian limiting distribution at rate. Using these results we can obtain asymptotically valid confidence intervals for the inverse temperature and the magnetic field at all points in the parameter space where consistent estimation is possible.
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DOI:
10.1214/22-aap1857
发表时间:
2020
期刊:
The Annals of Applied Probability
影响因子:
--
作者:
Nabarun Deb;S. Mukherjee
通讯作者:
S. Mukherjee
影响因子:
1.6
作者:
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DOI:
10.1214/19-aos1822
发表时间:
2018-01
期刊:
The Annals of Statistics
影响因子:
--
作者:
Promit Ghosal;S. Mukherjee
通讯作者:
Promit Ghosal;S. Mukherjee
影响因子:
1.6
作者:
BOVIER, A;GAYRARD, V
通讯作者:
GAYRARD, V
影响因子:
2.9
作者:
A. Barra
通讯作者:
A. Barra