Gravity Attraction as a Result of Resonant Interaction between Standing Quantum Recurrences

It has been shown theoretically that a gravity force can be formed between two phonon generators through resonant interacting between their phonon wave functions-standing recurrences in the medium of the physical vacuum. Following the theoretical model, an experimental gravity generator was developed based on a massive ferromagnetic toroid core with a coil.

Gravity Tests with Radio Pulsars

The discovery of the first binary pulsar in 1974 has opened up a completely new field of experimental gravity. In numerous important ways, pulsars have taken precision gravity tests quantitatively and qualitatively beyond the weak-field slow-motion regime of the Solar System. Apart from the first verification of the existence of gravitational waves, binary pulsars for the first time gave us the possibility to study the dynamics of strongly self-gravitating bodies with high precision. To date there are several radio pulsars known which can be utilized for precision tests of gravity. Depending on their orbital properties and the nature of their companion, these pulsars probe various different predictions of general relativity and its alternatives in the mildly relativistic strong-field regime. In many aspects, pulsar tests are complementary to other present and upcoming gravity experiments, like gravitational-wave observatories or the Event Horizon Telescope. This review gives an introduction to gravity tests with radio pulsars and its theoretical foundations, highlights some of the most important results, and gives a brief outlook into the future of this important field of experimental gravity.

Next steps

This final chapter consists of a brief discussion of where the reader can go from here: active research topics in general relativity and gravitation, open questions, and ideas for further study. Topics include exact and approximate solutions of the field equations, including numerical methods and perturbation theory; problems in mathematical relativity, including global geometric methods, singularity theorems, cosmic censorship, and asymptotic conditions; alternative models such as scalar-tensor models; approaches to quantum gravity; and experimental gravity. These topics are not discussed in any depth; rather, the chapter is meant as a “teaser” to encourage readers to look further.

EXPERIMENTAL GRAVITY IN SPACE — HISTORY, TECHNIQUES AND PROSPECTS

This is more an after-dinner talk than it is a presentation of research — nothing new, no references, incomplete. It is, rather, a somewhat personal view of: (1) the history of experimental gravity in space, (2) a discussion on the theoretical basis for the two major thrusts in the field — tests of post-Newtonian gravity and gravitational astronomy, and (3) a couple of brief comments on two of the future space opportunities that are discussed at this meeting, LATOR and LISA. My judgment is that we have done a lot to provide an experimental basis for the theory of gravity, and that we can do even more.