5 papers
Approximate Models for Gravitational Memory
Q-L Zhao, P. -M. Zhang, M. Elbistan +1
The large-distance approximation of a sandwich gravitational wave by a continuous but not necessarily smooth profile provides us with an approximate analytic description of particl…
Displacement memory for flyby
P. -M. Zhang, Q. -L. Zhao, J. Balog +1
Zel'dovich and Polnarev, in their seminal paper [1] suggested that a gravitational wave generated by flyby would merely displace the particles. We confirm their prediction numerica…
Gravitational Waves and Conformal Time Transformations
P. -M. Zhang, Q. -L. Zhao, P. A. Horvathy
Recent interest in the "memory effect" prompted us to revisit the relation of gravitational aves and oscillators. 50 years ago Niederer [1] found that an isotropic harmonic oscilla…
Time-dependent conformal transformations and the propagator for quadratic systems
Q. -L. Zhao, P. -M. Zhang, P. A. Horvathy
The method proposed by Inomata and his collaborators allows us to transform a damped Caldiroli-Kanai oscillator with time-dependent frequency to one with constant frequency and no…
Gravitational wave memory: further examples
P. -M. Zhang, Q. -L. Zhao, M. Elbistan +1
Ehlers and Kundt [1] argued in favor of the velocity effect: particles initally at rest hit by a burst of gravitational waves should fly apart with constant velocity after the wave…