Exploiting Binary Pulsars as Laboratories of Gravity Theories

2009 ◽  
pp. 43-75 ◽  
Author(s):  
Michael Kramer
Keyword(s):  
Binary Pulsars ◽  
Gravity Theories

The Role of Binary Pulsars in Testing Gravity Theories

2015 ◽  
pp. 279-312 ◽  
Author(s):  
Andrea Possenti ◽  
Marta Burgay
Keyword(s):  
Binary Pulsars ◽  
Gravity Theories

scholarly journals Constraints on Yukawa parameters by double pulsars

2012 ◽  
Vol 8 (S291) ◽  
pp. 372-374 ◽  
Author(s):  
Xue-Mei Deng ◽  
Yi Xie ◽  
Tian-Yi Huang
Keyword(s):  
General Relativity ◽  
Dark Matter ◽  
New Physics ◽  
Binary Pulsars ◽  
Gravity Theories ◽  
Significant Opportunity ◽  
Alternative Theories ◽  
Einstein’S General Relativity ◽  
Astrophysical Phenomena

AbstractAlthough Einstein's general relativity has passed all the tests so far, alternative theories are still required for deeper understanding of the nature of gravity. Double pulsars provide us a significant opportunity to test them. In order to probe some modified gravities which try to explain some astrophysical phenomena without dark matter, we use periastron advance $\dot{\omega}$ of four binary pulsars (PSR B1913+16, PSR B1534+12, PSR J0737-3039 and PSR B2127+11C) to constrain their Yukawa parameters: λ = (3.97 ± 0.01) × 108m and α = (2.40 ± 0.02) × 10−8. It might help us to distinguish different gravity theories and get closer to the new physics.

scholarly journals Hairy black holes in disformal scalar-tensor gravity theories

2021 ◽  
Vol 104 (2) ◽  
Author(s):  
Cristian Erices ◽  
Pantelis Filis ◽  
Eleftherios Papantonopoulos
Keyword(s):  
Black Holes ◽  
Hairy Black Holes ◽  
Gravity Theories

scholarly journals The Weyl double copy from twistor space

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Erick Chacón ◽  
Silvia Nagy ◽  
Chris D. White
Keyword(s):  
Exact Solutions ◽  
Twistor Space ◽  
Current Form ◽  
New Formalism ◽  
Petrov Types ◽  
Gravity Theories ◽  
Double Copy

Abstract The Weyl double copy is a procedure for relating exact solutions in biadjoint scalar, gauge and gravity theories, and relates fields in spacetime directly. Where this procedure comes from, and how general it is, have until recently remained mysterious. In this paper, we show how the current form and scope of the Weyl double copy can be derived from a certain procedure in twistor space. The new formalism shows that the Weyl double copy is more general than previously thought, applying in particular to gravity solutions with arbitrary Petrov types. We comment on how to obtain anti-self-dual as well as self-dual fields, and clarify some conceptual issues in the twistor approach.

scholarly journals Relating Gauge and Gravity Theories in the Large Mass Limit

2020 ◽  
Vol 125 (18) ◽  
Author(s):  
Kays Haddad ◽  
Andreas Helset
Keyword(s):  
Large Mass ◽  
Mass Limit ◽  
Gravity Theories

scholarly journals Noisy effects in interferometric quantum gravity tests

2017 ◽  
Vol 15 (08) ◽  
pp. 1740014 ◽  
Author(s):  
F. Benatti ◽  
R. Floreanini ◽  
S. Olivares ◽  
E. Sindici
Keyword(s):  
Quantum Gravity ◽  
Weak Coupling ◽  
Scale Effects ◽  
External Environment ◽  
Planck Scale ◽  
Canonical Commutation Relations ◽  
Commutation Relations ◽  
Photon Propagation ◽  
Gravity Theories ◽  
Planck Scale Effects

Quantum-enhanced metrology is boosting interferometer sensitivities to extraordinary levels, up to the point where table-top experiments have been proposed to measure Planck-scale effects predicted by quantum gravity theories. In setups involving multiple photon interferometers, as those for measuring the so-called holographic fluctuations, entanglement provides substantial improvements in sensitivity. Entanglement is however a fragile resource and may be endangered by decoherence phenomena. We analyze how noisy effects arising either from the weak coupling to an external environment or from the modification of the canonical commutation relations in photon propagation may affect this entanglement-enhanced gain in sensitivity.

scholarly journals Binary pulsars and relativistic gravity

1994 ◽  
Vol 66 (3) ◽  
pp. 711-719 ◽  
Author(s):  
Joseph H. Taylor
Keyword(s):  
Binary Pulsars

scholarly journals The momentum kernel of gauge and gravity theories

2011 ◽  
Vol 2011 (1) ◽  
Author(s):  
N. E. J. Bjerrum-Bohr ◽  
Poul H. Damgaard ◽  
Thomas Søndergaard ◽  
Pierre Vanhove
Keyword(s):  
Gravity Theories

scholarly journals Towards strong field tests of beyond Horndeski gravity theories

2017 ◽  
Vol 95 (6) ◽  
Author(s):  
Jeremy Sakstein ◽  
Eugeny Babichev ◽  
Kazuya Koyama ◽  
David Langlois ◽  
Ryo Saito
Keyword(s):  
Strong Field ◽  
Field Tests ◽  
Gravity Theories
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