Magnetic trapping of rare-earth atoms at millikelvin temperatures

Nature
Cindy I HancoxJohn M Doyle

Abstract

The ability to create quantum degenerate gases has led to the realization of Bose-Einstein condensation of molecules, atom-atom entanglement and the accurate measurement of the Casimir force in atom-surface interactions. With a few exceptions, the achievement of quantum degeneracy relies on evaporative cooling of magnetically trapped atoms to ultracold temperatures. Magnetic traps confine atoms whose electronic magnetic moments are aligned anti-parallel to the magnetic field. This alignment must be preserved during the collisional thermalization of the atomic cloud. Quantum degeneracy has been reached in spherically symmetric, S-state atoms (atoms with zero internal orbital angular momentum). However, collisional relaxation of the atomic magnetic moments of non-S-state atoms (non-spherical atoms with non-zero internal orbital angular momentum) is thought to proceed rapidly. Here we demonstrate magnetic trapping of non-S-state rare-earth atoms, observing a suppression of the interaction anisotropy in collisions. The atoms behave effectively like S-state atoms because their unpaired electrons are shielded by two outer filled electronic shells that are spherically symmetric. Our results are promising for the creation of quantum de...Continue Reading

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Citations

Aug 2, 2011·Physical Chemistry Chemical Physics : PCCP·Svetlana Kotochigova, Alexander Petrov
Jun 13, 2009·Science·Mark G Raizen
Mar 29, 2014·Nature·Albert FrischSvetlana Kotochigova
Feb 11, 2012·The Journal of Chemical Physics·Zhiying Li, Eric J Heller
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Jun 29, 2017·Nature Communications·Amir CapuaStuart S P Parkin
Dec 31, 2005·Physical Review Letters·J-H ChoiG Raithel
Feb 1, 2008·Physical Review Letters·J G E HarrisJ M Doyle
Sep 26, 2012·Physical Review Letters·Alexander PetrovSvetlana Kotochigova
Sep 16, 2014·Reports on Progress in Physics·Svetlana Kotochigova
Apr 14, 2019·Nature Communications·A GolovizinN Kolachevsky
May 21, 2005·Physical Review Letters·Kenneth MaussangJohn M Doyle
Oct 13, 2007·Physical Review Letters·Jürgen KästelRonald L Walsworth
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May 18, 2013·Physical Review Letters·Shinya KatoYoshiro Takahashi
May 18, 2013·Physical Review Letters·Colin Bryant ConnollyJohn M Doyle
Oct 15, 2008·Physical Review Letters·Nathan BrahmsJohn Doyle
Apr 8, 2014·Physical Review Letters·Hsin-I LuJohn M Doyle
Dec 31, 2008·Physical Review Letters·A YamaguchiY Takahashi

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