It is shown that in the passage of a short burst of nonlinear plane gravitational wave, the kinetic energy of free particles may either decrease or increase. The decrease or… Click to show full abstract
It is shown that in the passage of a short burst of nonlinear plane gravitational wave, the kinetic energy of free particles may either decrease or increase. The decrease or increase of the kinetic energy crucially depends on the initial conditions (position and velocity) of the a particle. Therefore a plane gravitational wave may extract energy from a physical system.
               
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