Unique effects in a response of ultracold atomic gases of alkali-metal atoms in the state with a Bose-Einstein condensate to the perturbation by an external electromagnetic field
DOI:
https://doi.org/10.15407/visn2016.07.019Keywords:
Bose-Einstein condensate, ultracold quantum gases, slowing and filtering of pulses, acceleration of particlesAbstract
We demonstrate some peculiar results in the phenomenon of a response of ultracold quantum gases in the state with a Bose-Einstein condensate. It is shown that, basing on the general theoretical approach proposed by authors, it is possible to study not only slowing of optical but also microwave electromagnetic pulses to extremely low values of the group velocity. The phenomenon of ultraslow electromagnetic waves can be used for detection and precise measurements of magnetic fields, high-quality filtering of pulses and more detailed analysis of atomic spectra. As a remarkable example of a potential “curious” application, we analyze a principal possibility of acceleration of relativistic particles by ultracold gases in the presence of inverse occupancy of quantum states.
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