Jens H. Gundlach

Jens H. Gundlach Jens Horst Gundlach (born 1961) is a German physicist, who has spent most of his career working in the United States and is now a full professor at the University of Washington in Seattle. He is known for his research on experimental gravitational physics and in the biophysics of nanopore sequencing technology. Gundlach received in 2001 the Francis M. Pipkin Award of the American Physical Society (APS), in 2009 was elected a Fellow of the APS, and in 2021 received, jointly with Eric Adelberger and Blayne Heckel, the Breakthrough Prize in Fundamental Physics. Quotes We report the first results from a new Torsion spring torsion-balance that uses a 3 ton Uranium source mass which slowly rotates around the pendulum. The highly symmetric pendulum consists of a Lead Pb-Copper Cu composition dipole suspended from a thin torsion fiber. The counter-balanced source is shaped to minimize Gravity gradiometry gravity gradients. New constraints on composition-dependent interactions with ranges down to 1 cm by J. H. Gundlach Perspectives in Neutrinos, Atomic Physics and Gravitation: Proceedings of the XXVIIIth Rencontre de Moriond, Series: Moriond Workshops : Villars Sur Ollon, Switzerland, January 30 - February 6, 1993 Volume 28, Issue 1 Moriond particle physics meetings; Volume 76 of Moriond series; Volume 13 of Moriond workshops Atlantica Soggier Frontières 1993 9782863321362 https://books.google.com/books?id=bhr2qTRpDL4C&pg=PA391 391–491 (quote from p. ; edited by J. Thanh Van Tran) The past fifteen years of laboratory-scale gravitational experimentation have been marked by many new and exciting developments. The field received a lot of impetus by the hypothesis of a ”fifth force” ... in 1986. This very testable new force would have been a blatant violation of the equivalence principle. The evidence for the 5th force was partially based on a reanalysis of the torsion balance data of Loránd Eötvös Baron Eötvös of the early 1900’s. Immediately several groups around the world started to do Eötvös experiment Eötvös-type experiments. The availability of new technologies combined with many new and creative ideas quickly led to several refined measurements by which the 5th force in its postulated form could be conclusively ruled out. However, the physics community was once again reminded of the importance of the equivalence principle which lies at the foundation of general relativity. Tests of the equivalence principle become particularly important for Grand unification theory grand unification schemes, most of which predict an equivalence principle breakdown at some level. In addition it is generally believed that the Standard Model standard model of particle physics can only be complete with the existence of new particles which could exist at high masses as well as at the ultra low energies. The latter frontier being covered by laboratory-gravity tests. Tabletop Gravity Experiments 12–14 Matters of Gravity (Anniversary Edition):The newsletter of the Topical Group on Gravitation of the American Physical Society Number 18 Fall 2001 https://arxiv.org/pdf/gr-qc/0109034 ... Newton’s revelations about gravity were motivated by the availability of quantitative observational data of the solar system. His theory seemed to be a complete and well-proven concept and it held for centuries. It was not until the last century that Einstein derived gravitation from the underlying spacetime concept. Einstein’s work was not provoked by observational facts, but was motivated on a purely theoretical basis, which makes his formalism and prediction particularly elegant. General Relativity presented a big change in concept beyond Newton and it predicted specific phenomena. These effects have been verified experimentally and to this date are being tested to higher and higher accuracy. The classical tests were: Tests of general relativity light bending, time dilation, gravitational redshift and Gravitational-wave astronomy observation of gravitational waves. Einstein’s General Relativity corrections are now being used on an everyday basis. A typical example is the Global Positioning System global positioning system (GPS), where General Relativity effects yield a combined effect of 38 Microsecond μs per day. The accuracy to which General Relativity can be confirmed is entirely limited by experimental uncertainties and none of the uncertainty originates from the theoretical description, since General Relativity has no adjustable parameters. It seems that to date, gravity is exactly described by General Relativity. 2005 Laboratory tests of gravity New Journal of Physics 7 1 205 https://iopscience.iop.org/article/10.1088/1367-2630/7/1/205/meta External links Category:1961 births Category:Living people Category:Academics from Germany Category:Physicists from Germany