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arXiv 0712.2330math-phcond-mat.stat-mechmath.MP
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一维局部平均场论中的周期极小元

Periodic minimizers in 1D local mean field theory

Alessandro Giuliani, Joel L. Lebowitz, Elliott H. Lieb

摘要:

利用反射正性技术,我们证明了一类介观自由能代表一维系统的竞争相互作用的极小的存在性。所有极小化器要么是周期性的,平均值为零,要么是常数符号。如果自由能中的局部项满足凸性条件,则所有极小化器要么是周期的,要么是常数的。这两种现象的例子。这推广了我们以前的工作,其中这些结果被证明为基态的晶格系统的铁磁最近邻相互作用和偶极型反铁磁长程相互作用。

英文摘要:

Using reflection positivity techniques we prove the existence of minimizers for a class of mesoscopic free-energies representing 1D systems with competing interactions. All minimizers are either periodic, with zero average, or of constant sign. If the local term in the free energy satisfies a convexity condition, then all minimizers are either periodic or constant. Examples of both phenomena are given. This extends our previous work where such results were proved for the ground states of lattice systems with ferromagnetic nearest neighbor interactions and dipolar type antiferromagnetic long range interactions.

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