Laser cooling of an expanding ultracold plasma

Abstract

We analyze the resonance absorption spectrum of ions in an expanding ultracold spherical plasma. It is shown that the spectrum width is controlled by the highest expansion velocity at the sphere boundary. As the expansion velocity grows, the initial optical thickness of the medium decreases and the medium becomes transparent. We suggest a broadband laser radiation in the red absorption spectrum of ions be used to decelerate ions in an expanding plasma in order to achieve crystallization.

Reduction of electron heating by magnetizing ultracold neutral plasma

“…Ions are also influenced by DIH, but on a longer timescale characterized by the ion plasma period (ω −1 pi ) [17,18]. Previous and ongoing efforts to increase coupling strength largely focus on ions, including laser cooling [19,20], introducing initial spatial correlation using blockaded Rydberg gases [7] or Fermi gases [21]. or by trapping the gas in an optical lattice [22,23].…”