* [[Superflydende faststoffast stof]]<ref>{{Cite web |url=http://physicsweb.org/articles/news/8/9/1/1 |title=2 September 2004, physicsweb: Evidence for supersolid is firmed up |access-date=19. december 2004 |archive-date=11. december 2004 |archive-url=https://web.archive.org/web/20041211061700/http://physicsweb.org/articles/news/8/9/1/1 |url-status=ok }}</ref><ref>[http://www.sciencedaily.com/releases/2005/05/050518103209.htm 2005-05-18, sciencedaily: Supersolids -- Can Atoms Unify And Flow Without Resistance?] {{Webarchive|url=https://web.archive.org/web/20050520021837/http://www.sciencedaily.com/releases/2005/05/050518103209.htm |date=20. maj 2005 }} Citat: "...Chan points out, the behavior of any atom can be described both as a particle and as a wave-packet...When the supercooled helium atoms expanded out into one another, he continues, they lost their individuality and became one giant atom..."</ref><ref>[http://www.sciencedaily.com/releases/2004/01/040115074553.htm 2004-01-15, ScienceDaily: Probable Discovery Of A New, Supersolid, Phase Of Matter] {{Webarchive|url=https://web.archive.org/web/20150205223304/http://www.sciencedaily.com/releases/2004/01/040115074553.htm |date= 5. februar 2015 }} Citat: "...We apparently have observed, for the first time, a solid material with the characteristics of a superfluid...but because all its particles are in the identical quantum state, it remains a solid even though its component particles are continually flowing..."</ref><ref>[http://physicsweb.org/articles/news/8/9/1/1 2 September 2004, physicsweb: Evidence for supersolid is firmed up] {{Webarchive|url=https://web.archive.org/web/20041211061700/http://physicsweb.org/articles/news/8/9/1/1 |date=11. december 2004 }} Citat: "...However, many of the details of the experiment are not yet understood. In an accompanying article Tony Leggett of the University of Illinois in Urbana writes that the experiment "will force theorists to revise dramatically the generally accepted picture of crystalline solid helium-4."..."</ref><ref>[http://physicsweb.org/articles/news/8/1/6/1 14 January 2004, physicsweb: Supersolid is seen in the lab] {{Webarchive|url=https://web.archive.org/web/20041211062854/http://physicsweb.org/articles/news/8/1/6/1 |date=11. december 2004 }} Citat: "...Eun-Seong Kim and Moses Chan of Pennsylvania State University say their supersolid behaves like a superfluid – a liquid that flows without resistance – but has all the characteristics of a crystalline solid (E Kim and M H W Chan 2004 Nature 427 225)..."</ref>
