English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a cooling method that should be generally applicable to atoms withnarrow optical transitions. This technique uses velocity-selective pulses todrive atoms towards a zero-velocity dark state and then quenches the excitedstate to increase the cooling rate. We demonstrate this technique of quenchednarrow-line cooling by reducing the 1-D temperature of a sample of neutral 40Caatoms. We velocity select and cool with the 1S0(4s2) to 3P1(4s4p) 657 nmintercombination line and quench with the 3P1(4s4p) to 1S0(4s5s)intercombination line at 553 nm, which increases the cooling rate eight-fold.Limited only by available quenching laser power, we have transferred 18 % ofthe atoms from our initial 2 mK velocity distribution and achieved temperaturesas low as 4 microK, corresponding to a vrms of 2.8 cm/s or 2 recoils at 657 nm.This cooling technique, which is closely related to Raman cooling, can beextended to three dimensions.Comment: 5 pages, 4 figures; Submitted to PRA Rapid Communication

physical review. a, atomic, molecular, and optical physics/physical review, a, atomic, molecular, and optical physics

Quenched narrow-line laser cooling of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>40</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">Ca</mml:mi></mml:math>to near the photon recoil limit

Quenched narrow-line laser cooling of40Cato near the photon recoil limit