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arXiv 0810.4548hep-th
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RxS2巨磁振子的N体动力学

N-body Dynamics of Giant Magnons in RxS2

Inês Aniceto, Antal Jevicki

摘要:

我们追求的多磁振子动力学的问题,专注于最简单的情况下,磁振子移动RxS 2和工作在半经典水平。通过Pohlmeyer约化,问题归结为另一个著名的可积场论,sine-Gordon模型,它可以通过Calogero型的N体模型精确描述。这两个理论在运动方程的层次上是一致的,但是像(磁振子和孤子的)能量和相关相移这样的物理量是不同的。我们从两个系统在运动方程水平上的等价性出发,要求新的(弦论)模型再现正确的磁振子能量和相移,这两者都不同于孤立子的情况。从能量的比较,我们建议一个哈密顿量,并从需要正确的相移,我们导致一个非平凡的泊松结构代表的磁振子。

英文摘要:

We pursue the question of multi-magnon dynamics, focusing on the simplest case of magnons moving on RxS2 and working at the semiclassical level. Through a Pohlmeyer reduction, the problem reduces to another well known integrable field theory, the sine-Gordon model, which can be exactly described through an N-body model of Calogero type. The two theories coincide at the level of equations of motion, but physical quantities like the energies (of magnons and solitons) and the associated phase shifts are different. We start from the equivalence of the two systems at the level of equations of motion and require that the new (string theory) model reproduces the correct magnon energies and the phase shift, both of which differ from the soliton case. From the comparison of energies we suggest a Hamiltonian, and from requiring the correct phase shift we are led to a nontrivial Poisson structure representing the magnons.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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