☆ 4.2 Review

Testing parity symmetry of gravity with gravitational waves

FRONTIERS IN ASTRONOMY AND SPACE SCIENCES (2023)

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Article Astronomy & Astrophysics

A simple parity violating model in the symmetric teleparallel gravity and its cosmological perturbations

Mingzhe Li et al.

Summary: This paper explores the cosmological applications and features of cosmological perturbations in parity violating models based on symmetric teleparallel gravity. It reveals that in addition to the known parity violation in tensor perturbations, vector perturbations in this model exhibit unique characteristics, with one mode behaving as a ghost at high momentum scales, leading to vacuum instability in the quantum theory of cosmological perturbations.

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Search for the Birefringence of Gravitational Waves with the Third Observing Run of Advanced LIGO-Virgo

Zhi-Chao Zhao et al.

Summary: By using the Advanced LIGO, Virgo, and KAGRA detector network, constraints on the birefringence of gravitational waves were placed during the third observing run, resulting in the strictest limit on the CPT-violating parameter to date.

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Article Astronomy & Astrophysics

Post-Newtonian parameters of ghost-free parity-violating gravities

Jin Qiao et al.

Summary: We investigate the slow-motion and weak-field approximation of a ghost-free parity-violating theory of gravity and derive the perturbative field equations modified by the parity-violating terms. The complete set of parametrized post-Newtonian (PPN) parameters is obtained by solving these equations. It is found that, except for an extra parameter K caused by the new curl-type term in the gravitomagnetic sector, all the PPN parameters are exactly the same as those in general relativity. The precession effects of gyroscopes are calculated, and the model parameters are constrained by the observations of the Gravity Probe B experiment.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2022)

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Article Astronomy & Astrophysics

Testing Lorentz invariance of gravity in the Standard-Model Extension with GWTC-3

Rui Niu et al.

Summary: The successful detection of gravitational waves provides a new avenue for exploring the nature of gravity. This study focuses on Lorentz symmetry during the propagation of gravitational waves. Bayesian inference on the waveform data reveals no evidence of Lorentz violation.

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Scalar Quadratic Maximum-likelihood Estimators for the CMB Cross-power Spectrum

Jiming Chen et al.

Summary: In this article, a new unbiased estimator, called the QLM-SZ estimator, is presented for estimating the cross-correlation power spectra of the cosmic microwave background. This estimator combines the Smith-Zaldarriaga approach and the scalar QML approach to achieve lower computational cost and faster running time.

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Performance forecasts for the primordial gravitational wave detection pipelines for AliCPT-1

Shamik Ghosh et al.

Summary: AliCPT is the first Chinese cosmic microwave background (CMB) experiment aiming to make the most precise measurements of CMB polarization in the northern hemisphere. Its key science goal is the detection of primordial gravitational waves (PGWs). Through the study and comparison of simulated data, it is found that AliCPT provides consistent and robust constraints on the tensor-to-scalar ratio, showcasing the potential of precise B-mode polarization measurement. It also complements various ground-based CMB experiments in the southern hemisphere.

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Article Astronomy & Astrophysics

Chirality of gravitational waves in Chern-Simons f (R) gravity cosmology

S. D. Odintsov et al.

Summary: In this paper, we investigate the chirality of primordial gravitational waves in an axionic Chern-Simons-corrected f(R) gravity framework. By considering two main axion models, we analyze the influence of the axion on tensor perturbations and provide analytical descriptions of the evolution of tensor modes during nearly de Sitter primordial evolution controlled by R2 gravity. Our results reveal that the tensor spectrum generated by the misalignment model exhibits strong chirality, while further research is needed for the kinetic axion model.

PHYSICAL REVIEW D (2022)

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Article Astronomy & Astrophysics

Constraining Scalar-tensor Theories Using Neutron Star-Black Hole Gravitational Wave Events

Rui Niu et al.

Summary: The article examines constraints on three scalar-tensor theories through gravitational wave observations, analyzing two neutron star-black hole events to draw conclusions. The research finds that the constraints provided by GWs are comparable to pulsar timing experiments for the DEF theory, but not competitive for the BD and SMG theories.

ASTROPHYSICAL JOURNAL (2021)

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Article Astronomy & Astrophysics

Gravitational Wave Implications for the Parity Symmetry of Gravity in the High Energy Region

Yi-Fan Wang et al.

Summary: Researchers used gravitational waves to experimentally test the parity conservation of gravity and found no violations of general relativity, constraining the lower bound of the parity-violating energy scale to be 0.09 GeV. They also discovered that third generation gravitational-wave detectors could potentially enhance this bound to O(10(2)) GeV, indicating that gravitational-wave astronomy may usher in a new era of testing the ultraviolet behavior of gravity in the high energy region.

ASTROPHYSICAL JOURNAL (2021)

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Propagation of gravitational waves in Chern-Simons axion F(R) gravity

Shin'ichi Nojiri et al.

PHYSICS OF THE DARK UNIVERSE (2020)

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Model-independent test of the parity symmetry of gravity with gravitational waves

Wen Zhao et al.

EUROPEAN PHYSICAL JOURNAL C (2020)

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Constraints on Newton's constant from cosmological observations

Ke Wang et al.

EUROPEAN PHYSICAL JOURNAL C (2020)

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Tests of CPT invariance in gravitational waves with LIGO-Virgo catalog GWTC-1

Sai Wang et al.

EUROPEAN PHYSICAL JOURNAL C (2020)

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A simple parity violating gravity model without ghost instability

Mingzhe Li et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

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Parity-violating gravity and GW170817 in non-Riemannian cosmology

Aindriu Conroy et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2019)

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Propagation of gravitational waves in Chern-Simons axion Einstein gravity

Shin'ichi Nojiri et al.

PHYSICAL REVIEW D (2019)

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Tibet's window on primordial gravitational waves

Hong Li et al.

NATURE ASTRONOMY (2018)

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Parity breaking signatures from a Chern-Simons coupling during inflation: the case of non-Gaussian gravitational waves

Nicola Bartolo et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2017)

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Detecting relic gravitational waves in the CMB: The contamination caused by the cosmological birefringence

Wen Zhao et al.

PHYSICS LETTERS B (2014)

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Primordial Gravitational Waves and Cosmology

Lawrence M. Krauss et al.

SCIENCE (2010)

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Stable indications of relic gravitational waves in Wilkinson Microwave Anisotropy Probe data and forecasts for the Planck mission

W. Zhao et al.

PHYSICAL REVIEW D (2009)

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Detecting relic gravitational waves in the CMB: Optimal parameters and their constraints

W. Zhao et al.

PHYSICAL REVIEW D (2009)

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Quantum gravity at a Lifshitz point

Petr Horava

PHYSICAL REVIEW D (2009)

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Chern-Simons modified general relativity

Stephon Alexander et al.

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS (2009)

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Higher curvature corrections to primordial fluctuations in slow-roll inflation

Masaki Satoh et al.

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2008)

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Probing polarization states of primordial gravitational waves with cosmic microwave background anisotropies

Shun Saito et al.

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