Quantizing gravity using physical states of a superstring
| Autor: | L. Maharana, P. K. Jena, B. B. Deo |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
High Energy Physics - Theory
Physics Field (physics) Lorentz transformation FOS: Physical sciences Superstring theory Astronomy and Astrophysics High Energy Physics::Theory symbols.namesake High Energy Physics - Theory (hep-th) Minkowski space symbols Quantum gravity Absorption (logic) Tensor Metric tensor (general relativity) Mathematical physics |
| Zdroj: | Gravitation and Cosmology. 15:97-108 |
| ISSN: | 1995-0721 0202-2893 |
| DOI: | 10.1134/s0202289309020017 |
| Popis: | A symmetric zero mass tensor of rank two is constructed using the superstring modes of excitation which satisfies the physical state constraints of a superstring. These states have one to one correspondence with quantised operators and are shown to be the absorption and emission quanta of the Minkowski space Lorentz tensors using the Gupta-Bleuler method of quantisation. The principle of equivalence makes the tensor identical to the metric tensor at any arbitrary space-time point. The propagator for the quantised field is deduced. The gravitational interaction is switched on by going over from ordinary derivatives to coderivatives.The Riemann-Christoffel affine connections are calculated and the weak field Ricci tensor $R^{0}_{\mu \nu}$ is shown to vanish. The interaction part $R^{int}_{\mu \nu}$ is found out and the exact $R_{\mu \nu}$ of theory of gravity is expressed in terms of the quantised metric. The quantum mechanical self energy of the gravitational field, in vacuum, is shown to vanish. It is suggested that quantum gravity may be renormalisable by the use of the physical ground states of the superstring theory. Comment: 14 pages |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink