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Laser Cooling and Bose Einstein Condensation
Published in Pradip Narayan Ghosh, Laser Physics and Spectroscopy, 2018
A large number of technical applications have also been envisaged and attempted. BEC atoms have been used as a coherent beam of atoms to develop atom chips of micrometric size. Since the atom beams are coherent in nature any beam of atoms from a Bose Einstein condensate can act like an atom laser having high energy that will have very strong penetrating power because of the coherent character of the beam. Many other applications are also considered.
Quantum dynamics and spectra of the iodine atom in a strong laser field as calculated with the URIMIR package
Published in Molecular Physics, 2019
R. Marquardt, M. Quack, J. Stohner, I. Thanopulos
The effect of strong off-resonant laser fields on atomic absorption lines probed by weak near-resonant fields is of interest in a variety of experiments. It can play a role in the operation of the iodine atom laser under certain conditions and it is of particular importance for experiments in laser chemical kinetics, where product yields and product state distributions are measured with uncertainty limited simultaneous high time and frequency resolution [41–44], including for instance hyperfine distributions in the iodine atoms. The effects can be estimated easily by perturbation theory [46], but the accuracy of these estimates has to our knowledge not been tested by comparison with accurate numerical calculations. Such a test was the principal goal of the present work.
Matterwave interferometric velocimetry of cold Rb atoms
Published in Journal of Modern Optics, 2018
Max Carey, Mohammad Belal, Matthew Himsworth, James Bateman, Tim Freegarde
In both c.w. and Ramsey spectroscopy, the signal observed is the convolution of the Doppler-shifted resonance with the cross-correlation of the atom-laser coherence. In conventional spectroscopy, the atom-laser interaction is dominated by the atomic and laser linewidths, collisions, and inhomogeneities in intensity, magnetic field and Zeeman sub-state, most of which contribute to a Voigt profile. Here, it is instead dominated by the double pulse of the Ramsey interaction, whose Fourier transform results in the sinusoidal fringes. In principle, there should be no Doppler sensitivity within the -pulses - although power constraints mean that in our case there are, as addressed in the Appendix 1.
Light, the universe and everything – 12 Herculean tasks for quantum cowboys and black diamond skiers
Published in Journal of Modern Optics, 2018
Girish Agarwal, Roland E. Allen, Iva Bezděková, Robert W. Boyd, Goong Chen, Ronald Hanson, Dean L. Hawthorne, Philip Hemmer, Moochan B. Kim, Olga Kocharovskaya, David M. Lee, Sebastian K. Lidström, Suzy Lidström, Harald Losert, Helmut Maier, John W. Neuberger, Miles J. Padgett, Mark Raizen, Surjeet Rajendran, Ernst Rasel, Wolfgang P. Schleich, Marlan O. Scully, Gavriil Shchedrin, Gennady Shvets, Alexei V. Sokolov, Anatoly Svidzinsky, Ronald L. Walsworth, Rainer Weiss, Frank Wilczek, Alan E. Willner, Eli Yablonovitch, Nikolay Zheludev
The laser operates via the Einstein stimulated emission coefficient and Bose condensation operates in a similar way. It is striking that the Bose condensation has so many features which make it look like an atom laser. This is the basis for Dan Kleppner’s calling the BEC an atom laser. Can this laser-BEC analogy give insight into BCS and the Higgs particle? [239].