Quantizing gravity using physical states of a superstring |
| |
Authors: | B B Deo P K Jena L Maharana |
| |
Affiliation: | (1) Department of Physics, Utkal University, Bhubaneswar, 751004, India;(2) Utkal University, Bhubaneswar, 751004, India |
| |
Abstract: | 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 a one to one correspondence with the quantized field operators and are
shown to be the absorption and emission quanta of the Minkowski space Lorentz tensor, using the quantum field theory method
of quantization. The principle of equivalence makes the tensor identical to the metric tensor at any arbitrary space-time
point. The propagator for the quantized field is deduced. The gravitational interaction is switched on by going over from
ordinary derivatives to co-derivatives. The Riemann-Christoffel affine connections are calculated, and the weak field Ricci
tensor R
μν
0 is shown to vanish. The interaction part R
μν
int is found, and the exact R
μν
of the theory of gravity is expressed in terms of the quantized metric. The quantum-mechanical self-energy of the gravitational
field in vacuum is shown to vanish. By the use of a projection operator, it is shown that gravitons are quanta of the general
relativity field which gives the Einstein equation G
μν
= 0. It is suggested that quantum gravity may be renormalizable by the use of the massless ground state of this superstring
theory for general relativity, and a tachyonic vacuum creates and annihilates quanta of quantized gravitational field. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|