# From B-modes to quantum gravity and unification of forces

@article{Krauss2014FromBT,
title={From B-modes to quantum gravity and unification of forces},
author={Lawrence Krauss and Frank Wilczek},
journal={International Journal of Modern Physics D},
year={2014},
volume={23},
pages={1441001}
}
• Published 2 April 2014
• Physics
• International Journal of Modern Physics D
It is commonly anticipated that gravity is subjected to the standard principles of quantum mechanics. Yet some — including Einstein — have questioned that presumption, whose empirical basis is weak. Indeed, recently Dyson has emphasized that no conventional experiment is capable of detecting individual gravitons. However, as we describe, if inflation occurred, the universe, by acting as an ideal graviton amplifier, affords such access. It produces a classical signal, in the form of macroscopic…
9 Citations
Signatures of the quantization of gravity at gravitational wave detectors
• Physics
Physical Review D
• 2021
We develop a formalism to calculate the response of a model gravitational wave detector to a quantized gravitational field. Coupling a detector to a quantum field induces stochastic fluctuations
Primordial massive gravitational waves from Einstein-Chern-Simons-Weyl gravity
• Physics
• 2014
We investigate the evolution of cosmological perturbations during de Sitter inflation in the Einstein-Chern-Simons-Weyl gravity. Primordial massive gravitational waves are composed of one scalar, two
Generalisations of holographic hydrodynamics: anomalous transport & fermionic universality
In the present thesis we study properties of strongly coupled hydrodynamic theories which may be described in terms of a dual higher dimensional gravitational system. Particular attention is given to
BICEP2, the curvature perturbation and supersymmetry
The tensor fraction $r\simeq 0.16$ found by BICEP2 corresponds to a Hubble parameter $H\simeq 1.0\times 10^{14}\GeV$ during inflation. This has two implications for the (single-field) slow-roll
Dark matter as Planck relics without too exotic hypotheses
• Physics
• 2019
The idea that dark matter could be made of stable relics of microscopic black holes is not new. In this article, we revisit this hypothesis, focusing on the creation of black holes by the scattering
Hessian and graviton propagator of the proper vertex
• Physics
• 2015
The proper spin-foam vertex amplitude is obtained from the EPRL vertex by projecting out all but a single gravitational sector, in order to achieve correct semi-classical behavior. In this paper we
N ov 2 01 5 Hessian and graviton propagator of the proper vertex Atousa
The proper spin-foam vertex amplitude is obtained from the EPRL vertex by projecting out all but a single gravitational sector, in order to achieve correct semi-classical behavior. In this paper we
Calibration method and uncertainty for the primordial inflation explorer (PIXIE)
• Physics
• 2020
The Primordial Inflation Explorer (PIXIE) is an Explorer-class mission concept to measure cosmological signals from both linear polarization of the cosmic microwave background and spectral
Will gravitational waves discover the first extra-galactic planetary system?
• Physics
• 2020
Gravitational waves have opened a new observational window through which some of the most exotic objects in the Universe, as well as some of the secrets of gravitation itself, can now be revealed.

## References

SHOWING 1-10 OF 29 REFERENCES
Using cosmology to establish the quantization of gravity
• Physics
• 2014
While many aspects of general relativity have been tested, and general principles of quantum dynamics demand its quantization, there is no direct evidence for that. It has been argued that
The Effect of Primordially Produced Gravitons upon the Anisotropy of the Cosmological Microwave Background Radiation
• Physics
• 1983
Abstract We consider the effect of primordially produced gravitons on the anisotropy of the cosmological microwave background radiation. For a universe that includes a phase of exponential expansion,
Grand unification, gravitational waves, and the cosmic microwave background anisotropy.
• Physics, Medicine
Physical review letters
• 1992
The stochastic gravitational wave background resulting from inflation and its effect on the cosmic microwave background radiation (CMBR) is reexamine and the energy density associated with gravitational waves from inflation is examined.
Signature of gravity waves in polarization of the microwave background
• Physics
• 1997
Using spin-weighted decomposition of polarization in the cosmic microwave background (CMB) we show that a particular combination of Stokes $Q$ and $U$ parameters vanishes for primordial fluctuations
Constraints on generalized inflationary cosmologies
• Physics
• 1984
We consider cosmologies having an inflationary period during which the Robertson-Walker scale factor is an arbitrary function of time satisfying R > 0 (not necessarily an exponential). We show that
Graviton creation in the inflationary universe and the grand unification scale
• Physics
• 1982
The creation of gravitons in the inflationary universe and their effects on the 3K photon background are considered. It is shown that the inflationary universe scenario is compatible with existing
Inflationary universe: A possible solution to the horizon and flatness problems
The standard model of hot big-bang cosmology requires initial conditions which are problematic in two ways: (1) The early universe is assumed to be highly homogeneous, in spite of the fact that
Unification of Couplings
• Physics
• 1991
Ambitious attempts to obtain a unified description of all the interactions of nature have so far been more notable for their ingenuity, beauty and chutzpah than for any help they have afforded toward
A New Type of Isotropic Cosmological Models without Singularity - Phys. Lett. B91, 99 (1980)
Abstract The Einstein equations with quantum one-loop contributions of conformally covariant matter fields are shown to admit a class of nonsingular isotropic homogeneous solutions that correspond to
A new inflationary universe scenario: A possible solution of the horizon
In order to map the power distribution of a nuclear fuel element, a passive detector is laid along the fuel element in situ to record the residual radiation of the fuel element. The detector