An experimental setup is proposed for the precise measurement of the quantum states of ultracold neutrons bound in the earth’s gravitational field. The experiment utilizes a CCD-based pixel sensor and magnification system to observe the fine structure of the neutron distribution. In this work, we analyzed the sensor’s deposited energy measurement capability and found that its spatial resolution...

Whether torsion plays or not a role in the description of the gravitational interaction is a problem that can only be solved by experiment. This is, however, a difficult task: since there are different possible interpretations for torsion, there is no a model–independent way to look for it. In these notes, two different possibilities will be reviewed, their consistency analyzed, and the corresp...

We show that a breakdown of the universality of the gravitational couplings to different neutrino flavors can be tested in long-baseline neutrinooscillation experiments. In particular we have analyzed in detail a proposed experiment at SOUDAN 2 with νμ beams from the Fermilab Main Injector. It turns out that we can study both masses of neutrinos and such a breakdown with sensitivity to the orde...

The paper contains a proposed experiment for testing the gravitomagnetic effect on the propagation of light around a rotating mass. The idea is to use a rotating spherical laboratory-scale shell, around which two mutually orthogonal lightguides are wound acting as the arms of an interferometer. Numerical estimates show that time of flight differences between the equatorial and polar guides coul...

In this overview of the MACRO experiment we recall the structure of the detector and discuss several physics topics: atmospheric neutrinos and neutrino oscillations, high energy neutrino astronomy, searches for WIMPs and for low energy stellar gravitational collapse neutrinos, stringent upper limits on GUT magnetic monopoles, high energy downgoing muons, primary cosmic ray composition and shado...

The Kohonen Algorithm was extended by (a) a coupling between node and input space based upon gravitational principles and (b) a controling mechanism based upon two-point correlation functions. The extended algorithm avoids optimization of the learning rate and neighbourhood parameters. Applications are given for both a 3-dimensional example data set with mixed topologies and a 13-dimensional da...

We report band formation and other pattern formation for a settling suspension of uniform non-Brownian particles in a completely filled horizontal rotating cylinder. The system shows a series of sharp pattern changes that are mapped out as a function of the rotation period and suspension viscosity. The experiment suggests that a large number of patterns and rich dynamics result from the interpl...

The appearance of peaks in various primordial fluctuation Fourier power spectra is a generic prediction of the inflationary scenario. We investigate whether future experiments, in particular the satellite experiment PLANCK, will be able to detect the possible appearance of these peaks in the B-mode polarization multipole power spectrum. This would yield a conclusive proof of the presence of a p...

An experiment in Low Earth Orbit (LEO) is proposed to measure components of the Riemann curvature tensor using atom interferometry. We show that the difference in the quantum phase ∆φ of an atom that can travel along two intersecting geodesics is given bymR0i0j/~ times the spacetime volume contained within the geodesics. Our expression for ∆φ also holds for gravitational waves in the long wavel...