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arXiv 1612.08985hep-th
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整体大荷下的阿贝尔纯量理论

Abelian scalar theory at large global charge

Orestis Loukas

摘要:

我们详细说明阿贝尔复杂的标量模型,这是由自然行动(所有的耦合是为了一),在固定的和大的全球$U(1)$收费在任意数量的维度。基态$| \upsilon\rangle$的零模相干构造和离心势的外观进行量子力学验证。使用路径积分公式,我们系统地分析了$| \upsilon\rangle$周围的量子涨落,以获得一个有效的行动的戈德斯通模式,这成为微扰意义时,电荷是大的。在这个制度中,我们明确表明,整个建设是稳定的量子校正,在这个意义上说,任何更高的衍生耦合戈德斯通的树级行动被抑制适当的权力的大电荷。

英文摘要:

We elaborate on Abelian complex scalar models, which are dictated by natural actions (all couplings are of order one), at fixed and large global $U(1)$ charge in an arbitrary number of dimensions. The ground state $| \upsilon\rangle$ is coherently constructed by the zero modes and the appearance of a centrifugal potential is quantum mechanically verified. Using the path integral formulation we systematically analyze the quantum fluctuations around $| \upsilon\rangle$ in order to derive an effective action for the Goldstone mode, which becomes perturbatively meaningful when the charge is large. In this regime we explicitly show that the whole construction is stable against quantum corrections, in the sense that any higher derivative couplings to Goldstone's tree-level action are suppressed by appropriate powers of the large charge.

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