二维N=（2，2）超Yang-Mills理论的真空能
Vacuum energy of two-dimensional N=(2,2) super Yang-Mills theory
摘要：
我们用晶格模拟方法测量了二维N=（2，2）超Yang-Mills理论的真空能.得到的真空能量密度为E_0=0.09（9）（+10-8）g^2，其中第一个误差是系统误差，第二个误差是统计误差，在控制系统尺度的因次规范耦合g中测量。这个结果与未破缺的超对称性是一致的，尽管我们不能排除可能存在非常小的非零真空能量。
英文摘要：
We measure the vacuum energy of two-dimensional N=(2,2) super Yang-Mills theory using lattice simulation. The obtained vacuum energy density is E_0=0.09(9)(+10-8) g^2, where the first error is the systematic and the second is the statistical one, measured in the dimensionful gauge coupling g which governs the scale of the system. The result is consistent with unbroken supersymmetry, although we cannot exclude a possible very small non-zero vacuum energy.
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