Kavli Affiliate: Lijing Shao
| First 5 Authors: Yiming Dong, Ziming Wang, Lijing Shao, ,
| Summary:
Lorentz Invariance Violation (LIV) is posited as a possible relic effect of
quantum gravity at low energy scales. The Standard-Model Extension provides an
effective field-theoretic framework for examining possible deviations
attributed to LIV. With the observations of the profiles and times of arrival
(TOAs) of pulses from pulsars, one can investigate the spin precession and
orbital dynamics of pulsars caused by LIV, and further place strict limits on
LIV coefficients. We revisit the project of limiting local LIV with updated
pulsar observations. We employ new parameter estimation method and utilize
state-of-the-art pulsar timing observation data and get new limits on 8 linear
combinations of LIV coefficients based on 25 tests from 12 different systems.
Compared to previous limits from pulsars, the precision has improved by a
factor of two to three. Additionally, we explore prospects for further
improvements from pulsars. Simulation results indicate that more observations
of spin precession in solitary millisecond pulsars could significantly improve
the accuracy of spatial LIV coefficients, potentially by three to four orders
of magnitude. As observational data accumulate, pulsars are anticipated to
increasingly contribute to the tests of LIV.
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