arXiv subjects

A. Mair

Publications and source records attributed to A. Mair.

3 recordsLinked to original sources

arXiv2001

Phase Coherence and Control of Stored Photonic Information

We report the demonstration of phase coherence and control for the recently developed "light storage" technique. Specifically, we use a pulsed magnetic field to vary the phase of atomic spin excitations which result from the deceleration and storing of a light pulse in warm Rb vapor. We then convert the spin excitations back into light and detect the resultant phase shift in an optical interferometric measurement. The coherent storage of photon states in matter is essential for the practical realization of many basic concepts in quantum information processing.

quant-ph↗

arXiv2000

Storage of light in atomic vapor

We report an experiment in which a light pulse is decelerated and trapped in a vapor of Rb atoms, stored for a controlled period of time, and then released on demand. We accomplish this storage of light by dynamically reducing the group velocity of the light pulse to zero, so that the coherent excitation of the light is reversibly mapped into a collective Zeeman (spin) coherence of the Rb vapor.

quant-ph↗

arXiv1996

Scaling approach to higher-twist corrections

Bjorken scaling is violetd. At large $x$-values ($0.7 \lesssim x \leq 1$) the violation is mainly attributed to $\propto 1/Q^2$ (higher-twist) corrections. We discuss how to incorporate such corrections by using a new scaling variable $\bar x(x,Q^2)$ which accounts for the non-perturbative effects due to the confining parton interaction in the final state. The approach can accomodate also the remaining QCD logarithmic corrections and the behaviour of the $F_2(x,Q^2)$ structure functions is reproduced, in a quite natural way, within a wide kinematical range.

hep-ph↗