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Papers by mehdi golshani
Modern Physics Letters A, 1998
Recently,2 a new quantum gravity theory was presented in which the quantum effects were represent... more Recently,2 a new quantum gravity theory was presented in which the quantum effects were represented by the conformal degree of freedom of the space–time metric. In this letter we show that in the framework of this theory, quantum gravity is nonlocal.
Modern Physics Letters A, 1998
Recently, it was shown that the quantum effects of the matter, could be used to determine the con... more Recently, it was shown that the quantum effects of the matter, could be used to determine the conformal degree of freedom of the space–time metric. So both gravity and quantum are geometrical features. Gravity determines the causal structure of the space–time, while quantum determines the scale of the space–time. In this letter, it is shown that it is possible to use the scalar-tensor framework to build a unified theory in which both quantum and gravitational effects are present.
Modern Physics Letters A, 1998
Recently,1 it was shown that quantum effects of matter could be identified with the conformal deg... more Recently,1 it was shown that quantum effects of matter could be identified with the conformal degree of freedom of the space–time metric. Accordingly, one can introduce quantum effects either by making a scale transformation (i.e. changing the metric), or by making a conformal transformation (i.e. changing all physical quantities). These two ways are investigated and compared. Also, it is argued that, the ultimate formulation of such a quantum gravity theory should be in the framework of the scalar–tensor theories.
International Journal of Modern Physics A, 1998
It is shown explicitly that in the framework of Bohmian quantum gravity, the equations of motion ... more It is shown explicitly that in the framework of Bohmian quantum gravity, the equations of motion of the space–time metric are Einstein's equations plus some quantum corrections. It is observed that these corrections are not covariant, so that in the framework of Bohmian quantum gravity the general covariance principle breaks down at the individual level. This principle is restored at the statistical level.
Modern Physics Letters A, 1998
Recently,2 a new quantum gravity theory was presented in which the quantum effects were represent... more Recently,2 a new quantum gravity theory was presented in which the quantum effects were represented by the conformal degree of freedom of the space–time metric. In this letter we show that in the framework of this theory, quantum gravity is nonlocal.
Modern Physics Letters A, 1998
Recently, it was shown that the quantum effects of the matter, could be used to determine the con... more Recently, it was shown that the quantum effects of the matter, could be used to determine the conformal degree of freedom of the space–time metric. So both gravity and quantum are geometrical features. Gravity determines the causal structure of the space–time, while quantum determines the scale of the space–time. In this letter, it is shown that it is possible to use the scalar-tensor framework to build a unified theory in which both quantum and gravitational effects are present.
Modern Physics Letters A, 1998
Recently,1 it was shown that quantum effects of matter could be identified with the conformal deg... more Recently,1 it was shown that quantum effects of matter could be identified with the conformal degree of freedom of the space–time metric. Accordingly, one can introduce quantum effects either by making a scale transformation (i.e. changing the metric), or by making a conformal transformation (i.e. changing all physical quantities). These two ways are investigated and compared. Also, it is argued that, the ultimate formulation of such a quantum gravity theory should be in the framework of the scalar–tensor theories.
International Journal of Modern Physics A, 1998
It is shown explicitly that in the framework of Bohmian quantum gravity, the equations of motion ... more It is shown explicitly that in the framework of Bohmian quantum gravity, the equations of motion of the space–time metric are Einstein's equations plus some quantum corrections. It is observed that these corrections are not covariant, so that in the framework of Bohmian quantum gravity the general covariance principle breaks down at the individual level. This principle is restored at the statistical level.