Bose-Fermi degeneracy and duality in non-supersymmetric strings
Bose-Fermi degeneracy and duality in non-supersymmetric strings
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非超对称弦中的玻色-费米简并性和对偶性
DOI：
10.1016/s0550-3213(98)00775-5
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
S. Tye
中科院分区：
文献类型：
--
作者：
G. Shiu;S. Tye
继 Kachru、Kumar 和 Silverstein 之后，我们构建了一组非超对称 II 型弦模型，该模型在每个质量水平上具有相同数量的玻色子和费米子。该模型是不对称的 Z2⊗ Z2′ 环折模型。我们证明，这种玻色-费米简并特征意味着单环和双环对宇宙常数的贡献都消失了。我们推测宇宙常数实际上对所有环都消失了。我们构建了一对强弱对偶模型，它们都具有玻色-费米简并性。这意味着至少存在一些对宇宙学常数的非微扰修正。
Following Kachru, Kumar and Silverstein, we construct a set of non-supersymmetric Type II string models which have equal numbers of bosons and fermions at each mass level. The models are asymmetric Z2⊗ Z2′ orbifolds. We demonstrate that this Bose-Fermi degeneracy feature implies that both the one-loop and the two-loop contributions to the cosmological constant vanish. We conjecture that the cosmological constant actually vanishes to all loops. We construct a strongweak dual pair of models, both of which have Bose-Fermi degeneracy. This implies that at least some of the non-perturbative corrections to the cosmological constant are absent.