An adiabatic phase in scattering

H. E. Moses

Erik Sjöqvist, Martin Almquist, Ken Roger Mattsson +2 more

The adiabatic Aharonov-Bohm (AB) effect is a manifestation of the Berry phase acquired when some slow variables take a planar spin around a loop. While the effect has been observed in molecular spectroscopy, direct measurement of the topological phase shift in a scattering experiment has been elusive in the past. Here, we demonstrate an adiabatic AB effect by explicit simulation of the dynamics of unpolarized very slow neutrons that scatter on a long straight current-carrying wire.

Yukap Hahn

The exact elastic optical potential is compared with an analogous potential in the adiabatic approximation, which is shown to give a lower bound on the scattering length. A variational-bound procedure is formulated to estimate the scattering length and also the scattering phase shift near the elastic threshold.

M. Katsuragawa, Jian Liang, Fam Le Kien +3 more

Summary form only given. Optical processes with strong-coupling and quantum-coherence are opening various new possibilities beyond the limit of conventional optical processes. Recently we have extended these optical processes to a condensed phase using solid hydrogen for stimulated Raman scattering (SRS) process. The essence of the work was the self-evolution of the strongly-coupled coherence using one excitation laser. In the present work we extend the above work to a more controllable scheme using two lasers. The point of the present report is the measurement of the SRS characteristics to the two-photon detuning. We show that the parametric SRS processes favorably occurs on the negative detuning side, in which the coherence can be evolved adiabatically to the anti-phased state coherence.

G. V. Dubrovskiǐ