Conveners
Talks on specific topics: I
- Anna Maria Nobili (Università di Pisa, Dipartimento di Fisica "E. Fermi")
We propose a scheme for continuously measuring the evolving quantum phase of a collective spin composed of $N$ pseudospins. Quantum nondemolition measurements of a lossy cavity mode interacting with an atomic ensemble are used to directly probe the phase of the collective atomic spin without converting it into a population difference. Unlike traditional Ramsey measurement sequences, our scheme...
We employ an effective field theory to study the detectability of sub-GeV dark matter through its interaction with the gapless excitations of superfluid He-4. In a quantum field theory language, the possible interactions between the dark matter and the superfluid phonon are solely dictated by symmetry. We compute the rate for the emission of one and two phonons, and show that these two...
In the presence of external perturbations, astrophysical black holes (BHs) relax toward
a Kerr spacetime, as a consequence of the final state conjecture. During the relaxation
process (ringdown), BHs emit a spectrum given by a superposition of damped
sinusoids whose parameters are completely determined by the asymptotic BH mass and
spin. The ringdown emission is observable in binary black...
In this talk, a series of experiments based on atom interferometry that can provide precision measurements and tests of gravitational interactions will be presented.
First, with rubidium atom interferometers, experiments aimed at the precision measurement of the Newtonian gravitational constant and at the test of the Equivalence Principle with quantum superpositions of internal states will be...
I will discuss how a class of Dark Energy models can be tested by studying the gravitational waves emitted during the ringdown phase after a black hole merger.