Evanescent Gravitational Waves
arXiv:1903.09690 · doi:10.1103/PhysRevD.101.084046
Abstract
We describe the properties of evanescent gravitational waves (EGWs)---wave solutions of Einstein equations which decay exponentially in some direction while propagating in another. Evanescent waves are well-known in acoustics and optics and have recently received much attention due to their extraordinary properties such as their transverse spin and spin-momentum locking. We show that EGWs possess similarly remarkable properties, carrying transverse spin angular momenta and driving freely falling test masses along in elliptical trajectories. Hence, test masses on a plane transverse to the direction of propagation exhibit correlated vector and scalar-like deformation---correlations which can be used to distinguish it from modified gravity. We demonstrate that EGWs are present and dominant in the vicinity of sub-wavelength sources such as orbiting binaries.
arXiv comment13 pages, movie link https://youtu.be/DB7mHGqsrLk
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- From Elastic Spin to Phonon Spin: Symmetry and Fundamental Relations
- Perturbative and non-linear analyses of gravitational turbulence in spacetimes with stable light rings
- Where is the ringdown? Reconstructing quasinormal modes from dispersive waves
- The dependence of evanescent wave polarization on the losses of guided optical modes
- Imaging the transverse spin density of light via electromagnetically induced transparency