Coherent control of atoms by synchrotron radiation

Y. Hikosaka, T. Kaneyasu, Masahiro Katoh

T. Kaneyasu, Y. Hikosaka, Masaki Fujimoto +2 more

Abstract Control of interference between wave packets is one of the basic concepts in coherent control that enables quantum manipulation of populations and reaction pathways in matter. We have recently shown a new method to achieve coherent control in the extreme ultraviolet and attosecond regime using synchrotron radiation. This method is based on the use of longitudinal coherence of light wave packets that are naturally included in the undulator radiation. For quantum manipulation of atomic systems, wave packet interference is precisely controlled by tuning the time delay between the light wave packets. Here we show that the quantum phase controlled by the time delay can be monitored as an initial phase of the quantum beat oscillation in fluorescence decay.

A. D. Gazazyan

Stéphane Aloïse, Patrick O’Keeffe, D. Cubaynes +2 more

Resonant atomic excitation by synchrotron radiation and subsequent ionization by a tunable dye laser is used to study the photoionization of short-lived Rydberg states in Xe. By combining circular and linear polarization of the synchrotron as well as of the laser photons the partial photoionization cross sections were separated in the region of overlapping autoionizing resonances of different symmetry and the parameters of the resonances were extracted.

Th. Amand, Valérie Blanchet, B. Girard +1 more

Petr M. Anisimov, Yuri V. Rostovtsev, J. Odeurs

We study nuclear elastic forward scattering of synchrotron radiation. In a simple model, we show that suppression of nuclear excitation by synchrotron radiation as well as nuclear elastic forward scattering are possible due to the formation of nuclear coherent population trapping. We consider a nucleus with ground- and excited-state nuclear momenta , , respectively. We demonstrate that nuclear coherent population trapping can be achieved for random phases of pulses in synchrotron radiation.