Quantum uncertainty in weakly non-ideal astrophysical plasma

Semiclassical collisional functions in a non ideal plasma

Collisions between atoms (or ions) and electrons play an important role in Astrophysics for spectroscopic diagnostics and modellisation of stellar interiors and atmospheres. Plasma shielding effects due to electron and ion correlations are not negligible in the physical conditions of white dwarfs, owing to their high density. They can also play a role in the case of rather cool stars and for hy...

Non quantum uncertainty relations of stochastic dynamics

First we describe briefly an information-action method for the study of stochastic dynamics of hamiltonian systems perturbed by thermal noise and chaotic instability. It is shown that, for the ensemble of possible paths between two configuration points, the action principle acquires a statistical form 〈δA〉 = 0. The main objective of this paper is to prove that, via this information-action descr...

Quantum Gravity at Astrophysical Distances?

Assuming that Quantum Einstein Gravity (QEG) is the correct theory of gravity on all length scales we use analytical results from nonperturbative renormalization group (RG) equations as well as experimental input in order to characterize the special RG trajectory of QEG which is realized in Nature and to determine its parameters. On this trajectory, we identify a regime of scales where gravitat...

Plasma polarization in massive astrophysical objects

Uncertainty Principles and Ideal Atomic

Suppose a discrete-time signal S(t), 0 t < N, is a superposition of atoms taken from a combined time/frequency dictionary made of spike sequences 1 ft= g and sinu-soids expf2iwt=N)= p N. Can one recover, from knowledge of S alone, the precise collection of atoms going to make up S? Because every discrete-time signal can be represented as a superposition of spikes alone, or as a superposition of...