Broadband laser cooling of trapped atoms with ultrafast pulses

Abstract

We demonstrate broadband laser cooling of atomic ions in an rf trap using ultrafast pulses from a modelocked laser. The temperature of a single ion is measured by observing the size of a time-averaged image of the ion in the known harmonic trap potential. While the lowest observed temperature was only about 1 K, this method efficiently cools very hot atoms and can sufficiently localize trapped atoms to produce near diffraction-limited atomic images.

References in corpus (4)

• Heating of trapped ions from the quantum ground state
• Robust long-distance entanglement and a loophole-free Bell test with ions and photons
• Efficient quantum computation with probabilistic quantum gates
• Precision lifetime measurements of a single trapped ion with ultrafast laser pulses

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