利用度规反转对称性解决量子场的宇宙学常数和零点能问题
A way to get rid of cosmological constant and zero point energy problems of quantum fields through metric reversal symmetry
摘要：
本文提出了一个框架来消除宇宙学常数的经验值与量子场真空能量对宇宙学常数的贡献之间的巨大差异。一个额外的维空间与度量反转对称性和$R^2$重力被认为是为此目的。由此产生的4维能量-动量张量（在额外维度上积分后获得）由包含非对角耦合的卡鲁扎-克莱因模式对的项组成。这反过来又一般地导致量子场的能量动量张量的真空期望值为零，并提供了一种解决量子场对真空能量密度的巨大贡献的方法。
英文摘要：
In this paper a framework is introduced to remove the huge discrepancy between the empirical value of the cosmological constant and the contribution to the cosmological constant predicted from the vacuum energy of quantum fields. An extra dimensional space with metric reversal symmetry and $R^2$ gravity is considered to this end. The resulting 4-dimensional energy-momentum tensor (obtained after integration over extra dimensions) consists of terms that contain off-diagonally coupled pair of Kaluza-Klein modes. This, in turn, generically results in vanishing of the vacuum expectation value of the energy-momentum tensor for quantum fields, and offers a way to solve the problem of huge contribution of quantum fields to the vacuum energy density.
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