A different kind of four dimensional brane for string theory
arXiv:2110.05584 · doi:10.1103/PhysRevD.105.126009
Abstract
We present a generalization of the string's Polyakov action that describes a conformally invariant four dimensional brane. The new extended object is very different from the traditional D-branes of string theory, but, nevertheless, shares some structural similarities with the string, especially when it comes to the low-energy limit of small tension. We introduce a rather rich structure of tensors that can play a role at low energies. In analogy with the bosonic string, we initiate the quantization of the new brane discussing the extent in which it produces a critical dimension of spacetime and Einstein's equations coupled to a scalar dilaton under some approximations.
arXiv comment13 pages, v2: several improvements including a new section, to appear in PRD
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