John M. Goodkind
email: jgoodkind@UCSD.EDU
Professor, Physics
Dept.
Ph.D. Duke University, 1960
Work in this laboratory has included condensed matter physics, fundamental quantum physics and gravity measurements. In condensed matter physics our earliest work was the development of nuclear adabatic demagnetization to cool liquid 3He below 10-3Kelvin to find and study the superfluid phase of that liquid. More recently we have measured the properties of very pure, near perfect crystals of solid 4He. Our work has shown that vacancies in the lattice behave as a Bose gas and the objective of the work was to obtain evidence for a possible Bose condensation of these vacancies.
Gravity as a function of time is most accurately measured over long periods of time using the superconducting gravimeter invented and developed in this laboratory. We have used it for fundamental gravity studies and for geophysics.
Electrons are bound to the surface of liquid helium by the weak image charge in the dielectric liquid. We have previously measured the tunneling rates from this bound state and found it in agreement with a numerical solution of the time dependent Schrodinger equation for the known potential. Currently our work is entirely devoted to development of this system for use as quantum logic gates for a possible quantum computer. The work involves nanofabrication of the elements required to trap and manipulate the quantum states of single electrons. One of the elements is the gold columns, 1.5 micrometers high by 0.1 micrometers diameter shown in the scanning electron microscope picture below.
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Selected Publications:
Search for Evidence of the Influence of Vacancies on the Thermal Conductivity of Solid 4He. With C.A. Burns. J. Low Temp. Phys., 93, (1993).
Pei-Chun Ho; Bindloss, I.P.; Goodkind, J.M. A new anomaly in solid 4He. Journal of Low Temperature Physics, vol.109, (no.3-4), Plenum, Nov. 1997. p.409-21.
Test of the Gravitational Inverse Square Law at 0.4 to 1.4 m Mass Separation. J. Goodkind, et al. Phys. Rev. D, 47, 1290 (1993).
Goodkind, J.M. Test of theoretical solid earth and ocean gravity tides. Geophysical Journal International, vol.125, (no.1), Blackwell Science for R. Astron. Soc.; Deutsche Geophys. Gesellschaft; Eur. Geophys. Soc, April 1996. p.106-14.
Courtier, N.; Ducarme, B.; Goodkind, J.; Hinderer, J.; Imanishi, Y.; Seama, N.; Sun, H.; Merriam, J.; Bengert, B.; Smylie, D.E. Global superconducting gravimeter observations and the search for the translational modes of the inner core. Physics of the Earth and Planetary Interiors, vol.117, (no.1-4), (Study of the Earth's Deep Interior (Voyage au Centre de la Terre). SEDI 98, Tours, France, 5-10 July 1998.) Elsevier, Jan. 2000. p.3-20.
Goodkind, J.M. The superconducting gravimeter. Review of Scientific Instruments, vol.70, (no.11), AIP, Nov. 1999. p.4131-52. 110 references.
Single Electron Tunneling from the Surface of Liquid Helium. With G.F. Saville, and P.M. Platzman. Phys. Rev. Lett., March 8, (1993).
Presentations:
Introduction to the System Presentation
©University of California, San Diego - Department of Physics 1998
Creation / Modification Date: December 04, 2001
