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[[File:Steven Chu NSF.jpg|thumb|left|Chu lecturing]]
After obtaining his doctorate he remained at Berkeley as a [[postdoctoral researcher]] for two years before joining [[Bell Labs]], where he and his several co-workers carried out his Nobel Prize-winning [[laser cooling]] work. He left Bell Labs and became a professor of physics at [[Stanford University]] in 1987,<ref name="Nobel" /> serving as the chair of its
Chu's early research focused on [[atomic physics]] by developing [[laser cooling]] techniques and the [[magneto-optical trap]]ping of atoms using [[lasers]]. He and his co-workers at Bell Labs developed a way to cool atoms by employing six laser beams opposed in pairs and arranged in three directions at right angles to each other. Trapping atoms with this method allows scientists to study individual atoms with great accuracy. Additionally, the technique can be used to construct an [[atomic clock]] with great precision.<ref name="NobelPhys">{{cite web|url=http://nobelprize.org/nobel_prizes/physics/laureates/1997/press.html|title=The Nobel Prize in Physics 1997|publisher=[[Nobel Foundation]]|date=1997-10-15|access-date=2009-03-13}}</ref>
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[[File:Pontifical Academician Steven Chu.jpg|thumb|Chu with his medal as a Pontifical Academician, 2018]]
Chu received an honorary doctorate from [[Boston University]] when he was the keynote speaker at the 2007 commencement exercises.<ref>{{cite web|url=http://www.bu.edu/commencement/2007/address.html|title=Commencement 2007: Address and Honorees|publisher=[[Boston University]]|access-date=2009-01-25|url-status=dead|archive-url=https://web.archive.org/web/20081012080300/http://www.bu.edu/commencement/2007/address.html|archive-date=2008-10-12}}</ref> He is a
[[Washington University in St. Louis]] and [[Harvard University]] awarded him honorary doctorates during their 2010 and 2009 commencement exercises, respectively.<ref>{{cite web |date=2010-05-06 |title=Five to receive honorary degrees |url=http://news.wustl.edu/news/Pages/20707.aspx |publisher=[[Washington University in St. Louis]]}}</ref><ref>{{cite web|url=http://www.news.harvard.edu/gazette/2009/06.04/honorands.html|title=Ten honorary degrees awarded at Commencement|publisher=[[Harvard University]]|url-status=dead|archive-url=https://web.archive.org/web/20090609021455/http://www.news.harvard.edu/gazette/2009/06.04/honorands.html|archive-date=2009-06-09}}</ref> He was awarded an honorary degree from [[Yale University]] during its 2010 commencement.<ref>{{cite news| url=http://www.huffingtonpost.com/2010/05/24/yale-graduation_n_587773.html | work=Huffington Post | first=Leah | last=Finnegan | title=Celebs Converge At Yale's Graduation Ceremony (PHOTOS) | date=2010-05-24}}</ref> He was also awarded an honorary degree from the [[Polytechnic Institute of New York University]], the same institution at which his father taught for several years, during its 2011 commencement.<ref>{{Cite web |url=http://www.poly.edu/press-release/2011/04/25/us-doe-secretary-steven-chu-speak-nyu-poly-commencement |title=Home | NYU Tandon School of Engineering |access-date=2012-05-17 |archive-url=https://web.archive.org/web/20110907080611/http://www.poly.edu/press-release/2011/04/25/us-doe-secretary-steven-chu-speak-nyu-poly-commencement |archive-date=2011-09-07 |url-status=dead }}</ref> [[Penn State University]] awarded him an honorary doctorate during their 2012 commencement exercises.<ref name="Penn State Live">{{cite web|url=http://live.psu.edu/story/59426|title=U.S. Secretary of Energy to speak at May 5 commencement ceremony|publisher=The Pennsylvania State University|access-date=2012-04-26|url-status=dead|archive-url=https://web.archive.org/web/20120428145627/http://live.psu.edu/story/59426|archive-date=2012-04-28}}</ref> In 2014, Chu was awarded an honorary doctorate from [[Williams College]], during which he gave a talk moderated by Williams College Professor Protik Majumder.<ref name="williamscollege">{{cite press release |author=<!--Staff writer(s); no by-line.--> |title=Williams College Announces its 2014 Honorary Degree Recipients |url=http://communications.williams.edu/news-releases/3_19_2014_honorarydegree/ |location=Williamstown, Massachusetts |publisher=[[Williams College]] |date=2014-03-19 |access-date=2014-06-11}}</ref> He was awarded an honorary doctorate from [[Dartmouth College]] during its 2015 commencement.<ref>{{cite web |title=Steven Chu (Doctor of Science) |url=https://news.dartmouth.edu/news/2015/06/steven-chu-doctor-science |website=Dartmouth News |access-date=9 October 2020 |language=en |date=14 June 2015}}</ref> Chu was also awarded an honorary doctorate from [[Amherst College]] in 2017, where he later gave a lecture titled "Climate Change and Needed Technical Solutions for a Sustainable Future" in March 2018.<ref>{{Cite web|url=https://www.amherst.edu/news/specialevents/commencement/awards/2017-honorees/steven-chu|title=2017 Honorees {{!}} Steven Chu {{!}} Amherst College|website=www.amherst.edu|language=en|access-date=2018-08-01}}</ref><ref>{{Cite web|url=https://www.amherst.edu/academiclife/departments/physics/seminars_and_colloquia/node/707123|title=Seminars & Colloquia {{!}} Professor Steven Chu, Stanford University: "Climate Change and needed technical solution for a sustainable future" {{!}} Amherst College|website=www.amherst.edu|language=en|access-date=2018-08-01}}</ref>
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