Fourth-derivative relativistic quantum gravity

We consider relativistic quantum gravity with the action including terms quadratic in the curvature tensor. This model is known to be renormalizable. We demonstrate that the model is also unitary. New expressions for the corresponding Lagrangian and the graviton propagator within dimensional regularization are derived. We argue that the considered model is the proper candidate for the fundamental quantum theory of gravitation.

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Higher-derivative relativistic quantum gravity

Modern Physics Letters A ◽

10.1142/s0217732318500281 ◽

2018 ◽

Vol 33 (05) ◽

pp. 1850028 ◽

Cited By ~ 1

Author(s):

S. A. Larin

Keyword(s):

Quantum Theory ◽

Quantum Gravity ◽

Curvature Tensor ◽

Relativistic Quantum ◽

Dimensional Regularization ◽

Quantum Theory Of Gravitation ◽

Higher Derivative ◽

Graviton Propagator ◽

Theory Of Gravitation

Relativistic quantum gravity with the action including terms quadratic in the curvature tensor is analyzed. We derive new expressions for the corresponding Lagrangian and the graviton propagator within dimensional regularization. We argue that the considered model is a good candidate for the fundamental quantum theory of gravitation.

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Renormalizable and Unitary Model of Quantum Gravity

Symmetry ◽

10.3390/sym11111334 ◽

2019 ◽

Vol 11 (11) ◽

pp. 1334

Author(s):

S. A. Larin

Keyword(s):

Quantum Theory ◽

Quantum Gravity ◽

Curvature Tensor ◽

Relativistic Quantum ◽

Dimensional Regularization ◽

Graviton Propagator ◽

Unitary Model ◽

Theory Of Gravity ◽

Made In

We consider R + R 2 relativistic quantum gravity with the action where all possible terms quadratic in the curvature tensor are added to the Einstein-Hilbert term. This model was shown to be renormalizable in the work by K.S. Stelle. In this paper, we demonstrate that the R + R 2 model is also unitary contrary to the statements made in the literature, in particular in the work by Stelle. New expressions for the R + R 2 Lagrangian within dimensional regularization and the graviton propagator are derived. We demonstrate that the R + R 2 model is a good candidate for the fundamental quantum theory of gravity.

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Renormalizable and Unitary Lorentz Invariant Model of Quantum Gravity

10.20944/preprints202109.0462.v1 ◽

2021 ◽

Author(s):

S. A. Larin

Keyword(s):

General Relativity ◽

Quantum Theory ◽

Quantum Gravity ◽

Curvature Tensor ◽

Quantum Theory Of Gravitation ◽

Proper Choice ◽

Invariant Model ◽

Self Consistent ◽

Theory Of Gravitation

We analyze the R + R2 model of quantum gravity where terms quadratic in the curvature tensor are added to the General Relativity action. This model was recently proved to be a self-consistent quantum theory of gravitation, being both renormalizable and unitary. The model can be made practically indistinguishable from General Relativity at astrophysical and cosmological scales by the proper choice of parameters.

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Renormalizable and Unitary Lorentz Invariant Model of Quantum Gravity

Universe ◽

10.3390/universe7110435 ◽

2021 ◽

Vol 7 (11) ◽

pp. 435

Author(s):

Sergey A. Larin

Keyword(s):

General Relativity ◽

Quantum Theory ◽

Quantum Gravity ◽

Curvature Tensor ◽

Quantum Theory Of Gravitation ◽

Proper Choice ◽

Invariant Model ◽

Self Consistent ◽

Theory Of Gravitation

We analyze the R+R2 model of quantum gravity where terms quadratic in the curvature tensor are added to the General Relativity action. This model was recently proved to be a self-consistent quantum theory of gravitation, being both renormalizable and unitary. The model can be made practically indistinguishable from General Relativity at astrophysical and cosmological scales by the proper choice of parameters.

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Black Holes and Quantum Gravity

Inference: International Review of Science ◽

10.37282/991819.20.37 ◽

2020 ◽

Vol 5 (3) ◽

Author(s):

Aurélien Barrau

Keyword(s):

Black Holes ◽

Black Hole ◽

Quantum Theory ◽

Quantum Gravity ◽

Gravitational Waves ◽

Quantum Theory Of Gravitation ◽

Theoretical Physics ◽

Radio Interferometry ◽

Theory Of Gravitation ◽

Observational Science

The search for a quantum theory of gravitation is considered one of the most important problems in theoretical physics. Might black holes provide a key? Researchers are beginning to think that the emergence of a true black hole astronomy based on the measurement of gravitational waves and radio interferometry could bring quantum gravity into the field of experimental or observational science.

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