부산대학교 도서관

Summary: ``We study gravitational lensing of gravitational waves takinginto account the spin of gravitational waves coupled with a draggedspacetime made by a rotating object. We decompose the phase ofgravitational waves into helicity-dependent and helicity-independentcomponents with spin optics, analyzing waves whose wavelengths areshorter than the curvature radius of a lens object. We analyticallyconfirm that the trajectory of gravitational waves splits depending onthe helicity, generating additional time delay and ellipticalpolarization onto the helicity-independent part. We exemplifymonochromatic gravitational waves lensed by a Kerr black hole andderive the analytical expressions of corrections in phase andmagnification. The corrections are enhanced for longer wavelengths,potentially providing a novel probe of rotational properties of lensobjects in low-frequency gravitational-wave observations in thefuture.''