Editing Anti-gravity (section)

===Gravitoelectric coupling===
In 1992, the Russian researcher [[Eugene Podkletnov]] claimed to have discovered, whilst experimenting with [[superconductor]]s, that a fast rotating superconductor reduces the gravitational effect.<ref>{{cite journal|last1=Podkletnov|first1=E|last2=Nieminen|first2=R |title=A possibility of gravitational force shielding by bulk YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7−x</sub> superconductor|journal=[[Physica C]] |volume=203|issue=3–4|date=10 December 1992|pages=441–444|bibcode = 1992PhyC..203..441P |doi = 10.1016/0921-4534(92)90055-H }}</ref> Many studies have attempted to reproduce Podkletnov's experiment, always to negative results.<ref>{{cite journal| display-authors=4| author=N. Li| author2=D. Noever| author3=T. Robertson| author4=R. Koczor| author5=W. Brantley| name-list-style=amp|title=Static Test for a Gravitational Force Coupled to Type II YBCO Superconductors|journal=[[Physica C]]|volume=281|issue=2–3|date=August 1997|pages=260–267|bibcode = 1997PhyC..281..260L |doi = 10.1016/S0921-4534(97)01462-7 }}</ref><ref>{{cite book | doi=10.2514/6.2001-3363 | chapter=Gravity modification by high-temperature superconductors | title=37th Joint Propulsion Conference and Exhibit | date=2001 | last1=Woods | first1=C. | last2=Helme | first2=J. | last3=Cooke | first3=S. | last4=Caldwell | first4=C. }}</ref><ref>{{cite journal | doi=10.1016/S0921-4534(02)02284-0 | title=Gravity modification experiment using a rotating superconducting disk and radio frequency fields | date=2003 | last1=Hathaway | first1=G. | last2=Cleveland | first2=B. | last3=Bao | first3=Y. | journal=Physica C: Superconductivity | volume=385 | issue=4 | pages=488–500 | bibcode=2003PhyC..385..488H }}</ref><ref>{{cite journal | doi=10.1016/S0921-4534(02)02305-5 | title=Gravitomagnetic field of a rotating superconductor and of a rotating superfluid | date=2003 | last1=Tajmar | first1=M. | last2=De Matos | first2=C.J. | journal=Physica C: Superconductivity | volume=385 | issue=4 | pages=551–554 | arxiv=gr-qc/0203033 | bibcode=2003PhyC..385..551T }}</ref>

Douglas Torr, of the [[University of Alabama in Huntsville]] proposed how a time-dependent magnetic field could cause the spins of the lattice ions in a superconductor to generate detectable [[Gravitoelecromagnetism|gravitomagnetic and gravitoelectric]] fields in a series of papers published between 1991 and 1993.<ref>{{cite journal |journal=Physical Review |date=1 September 1992 |doi=10.1103/PhysRevB.46.5489 |pmid=10004334 |title=Gravitational effects on the magnetic attenuation of superconductors |last1=Li |first1=Ning |last2=Torr |first2=DG |volume=B46 |issue=9 |pages=5489–5495 |bibcode = 1992PhRvB..46.5489L }}</ref><ref>{{cite journal |journal=Physical Review |date=15 January 1991 |title=Effects of a gravitomagnetic field on pure superconductors |last1=Li |first1=Ning |last2=Torr |first2=DG |volume=D43 |issue=2 |pages=457–459 |doi=10.1103/PhysRevD.43.457 |pmid=10013404 |bibcode=1991PhRvD..43..457L }}</ref><ref>{{cite journal |last1=Li |first1=Ning |last2=Torr |first2=DG |journal=Foundations of Physics Letters |title=Gravitoelectric-electric coupling via superconductivity |volume=6 |issue=4 |pages=371–383 |date=August 1993 |bibcode=1993FoPhL...6..371T |doi=10.1007/BF00665654 |s2cid=122075917 }}</ref> In 1999, a Miss Li appeared in ''[[Popular Mechanics]]'', claiming to have constructed a working [[prototype]] to generate what she described as "AC Gravity." No further evidence of this prototype has been offered.<ref>{{cite journal |url=http://www.highbeam.com/doc/1G1-65730414.html |archive-url=https://web.archive.org/web/20121105040310/http://www.highbeam.com/doc/1G1-65730414.html |url-status=dead |archive-date=5 November 2012 |title=Taming Gravity |journal=Popular Mechanics |date=1 October 2000 |first=Jim |last=Wilson |access-date=5 January 2014 }}</ref><ref>{{cite web |url=http://www.light-science.com/gen2.html |title=Gravity Conquered? |last=Cain |first=Jeanette |publisher=light-science.com |access-date=5 January 2014 |url-status=dead |archive-url=https://web.archive.org/web/20130706031149/http://www.light-science.com/gen2.html |archive-date=6 July 2013 }}</ref>

Douglas Torr and [[Timir Datta]] were involved in the development of a "gravity generator" at the [[University of South Carolina]].<ref>{{cite web |title=Patent and Copyright Committee List of Disclosures Reviewed Between July 1996 and June 1997 - USC ID|number=96140 |url=http://www.sc.edu/faculty/senate/97/annual/patentlist.html|access-date=2 May 2014 |archive-url=https://web.archive.org/web/20140502013440/http://www.sc.edu/faculty/senate/97/annual/patentlist.html |archive-date=2 May 2014 }}</ref> According to a leaked document from the Office of Technology Transfer at the University of South Carolina and confirmed to [[Wired (magazine)|''Wired'']] reporter Charles Platt in 1998, the device would create a "force beam" in any desired direction and the university planned to patent and license this device. No further information about this university research project or the "Gravity Generator" device was ever made public.<ref name="Platt1998">{{cite news |last=Platt |first=Charles |date=March 1, 1998 |title=Breaking the Law of Gravity |newspaper=Wired |url=https://www.wired.com/1998/03/antigravity/ |access-date=May 10, 2025 }}</ref>