Superfast laser cooling.
Phys Rev Lett 104:18 (2010) 183001
Abstract:
Currently, laser cooling schemes are fundamentally based on the weak coupling regime. This requirement sets the trap frequency as an upper bound to the cooling rate. In this work we present a numerical study that shows the feasibility of cooling in the strong-coupling regime which then allows cooling rates that are faster than the trap frequency with experimentally feasible parameters. The scheme presented here can be applied to trapped atoms or ions as well as to mechanical oscillators. It can also cool medium sized ion chains close to the ground state.Superfast Cooling
(2010)
Superfast Laser Cooling
PHYSICAL REVIEW LETTERS 104:18 (2010) ARTN 183001
Implementation of a symmetric surface electrode ion trap with field compensation using a modulated Raman effect
ArXiv 0909.3272 (2009)
Abstract:
We describe the fabrication and characterization of a new surface-electrode Paul ion trap designed for experiments in scalable quantum information processing with Ca+. A notable feature is a symmetric electrode pattern which allows rotation of the normal modes of ion motion, yielding efficient Doppler cooling with a single beam parallel to the planar surface. We propose and implement a technique for micromotion compensation in all directions using an infrared repumper laser beam directed into the trap plane. Finally, we employ an alternate repumping scheme that increases ion fluorescence and simplifies heating rate measurements obtained by time-resolved ion fluorescence during Doppler cooling.Implementation of a symmetric surface electrode ion trap with field compensation using a modulated Raman effect
(2009)