反重力現象及理論
US Choral Society-104255 03/03 54034.0/1
現象
實驗
理論
Ning Li is an American scientist known for her controversial claims about anti-gravity devices. She worked as a physicist at the Center for Space Plasma and Aeronomic Research, University of Alabama in Huntsville, in the 1990s. In 1999, she left the university to form a company, AC Gravity, LLC, to continue anti-gravity research.
In a series of papers co-authored with fellow university physicist Douglas Torr and published between 1991 and 1993, she claimed a practical way to produce anti-gravity effects. She claimed that an anti-gravity effect could be produced by rotating ions creating a gravitomagnetic field perpendicular to their spin axis. In her theory, if a large number of ions could be aligned, (in a Bose–Einstein condensate) the resulting effect would be a very strong gravitomagnetic field producing a strong repulsive force. The alignment may be possible by trapping superconductor ions in a lattice structure in a high-temperature superconducting disc. Li claimed that experimental results confirmed her theories.[1][2][3] Her claim of having functional anti-gravity devices was cited by the popular press and in popular science magazines with some enthusiasm at the time.[4][5] However, in 1997 Li published a paper describing an experiment that showed the effect was very small, if it existed at all.[6] Li is reported to have left the University of Alabama in 1999 to found the company AC Gravity LLC. AC Gravity was awarded a U.S. DOD grant for $448,970 in 2001 to continue anti-gravity research. The grant period ended in 2002 but no results from this research were ever made public.[7] Although no evidence exists that the company ever performed any other work, as of 2014, AC Gravity still remains listed as an "existent" business.[
