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arXiv 0709.0731hep-th
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超对称量子力学中的几何相位

The Geometric Phase in Supersymmetric Quantum Mechanics

Chris Pedder, Julian Sonner, David Tong

摘要:

研究了N=(2,2)超对称量子力学中的几何相位. Witten指数保证了简并基态的存在,导致非阿贝尔Berry连接。我们展示了一个非重整化定理,禁止接收微扰校正的连接。然而,我们表明它确实收到了BPS瞬子的修正。我们计算了当势变化时,有质量CP^1 σ模型的一瞬子对Berry连接的贡献。该系统具有两个基态,对应的Berry联络是光滑的SU(2)'tHooft-Polyakov联络.

英文摘要:

We explore the geometric phase in N=(2,2) supersymmetric quantum mechanics. The Witten index ensures the existence of degenerate ground states, resulting in a non-Abelian Berry connection. We exhibit a non-renormalization theorem which prohibits the connection from receiving perturbative corrections. However, we show that it does receive corrections from BPS instantons. We compute the one-instanton contribution to the Berry connection for the massive CP^1 sigma-model as the potential is varied. This system has two ground states and the associated Berry connection is the smooth SU(2) 't Hooft-Polyakov monopole.

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