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arXiv 1609.05770hep-th
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解构零:复苏,超对称和复杂的马鞍

Deconstructing zero: resurgence, supersymmetry and complex saddles

Gerald V. Dunne, Mithat Unsal

摘要:

我们解释了如何消失,或截断,微扰膨胀,如经常出现在半经典听话的超对称理论,但可以通过复苏有关的非微扰部门的波动。我们还证明,在同一类理论中,基态能量的消失(未破缺的超对称性)可以归因于实鞍和复鞍(具有隐藏的拓扑角π)之间的抵消,而基态能量的正性(破缺的超对称性)可以解释为复鞍的优势。在这两种情况下,尽管在微扰理论中基态能量对所有阶数都是零,但非微扰鞍附近的所有阶数的波动都被编码在微扰E(N,g)中。我们用超对称量子力学和量子场论的例子来说明这些观点。

英文摘要:

We explain how a vanishing, or truncated, perturbative expansion, such as often arises in semi-classically tractable supersymmetric theories, can nevertheless be related to fluctuations about non-perturbative sectors via resurgence. We also demonstrate that, in the same class of theories, the vanishing of the ground state energy (unbroken supersymmetry) can be attributed to the cancellation between a real saddle and a complex saddle (with hidden topological angle pi), and positivity of the ground state energy (broken supersymmetry) can be interpreted as the dominance of complex saddles. In either case, despite the fact that the ground state energy is zero to all orders in perturbation theory, all orders of fluctuations around non-perturbative saddles are encoded in the perturbative E(N, g). We illustrate these ideas with examples from supersymmetric quantum mechanics and quantum field theory.

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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