Person: Burns, Michael
Loading...
Email Address
AA Acceptance Date
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
Burns
First Name
Michael
Name
Burns, Michael
6 results
Search Results
Now showing 1 - 6 of 6
Publication Optical binding(American Physical Society (APS), 1989) Burns, Michael; Fournier, Jean-Marc; Golovchenko, JeneSignificant forces between dielectric objects can be induced by intense optical fields. We discuss the origin of these forces which are very long range and oscillate in sign at the optical wavelength. A consequence is that light waves can serve to bind matter in new organized forms. We experimentally demonstrate the simplest case by observing a series of bound states between two 1.43-μm-diam plastic spheres in water, and discuss the extension to more complex cases.Publication Nanoscale dynamics of Joule heating and bubble nucleation in a solid-state nanopore(American Physical Society (APS), 2016) Levine, Edlyn; Burns, Michael; Golovchenko, JeneWe present a mathematical model for Joule heating of an electrolytic solution in a nanopore. The model couples the electrical and thermal dynamics responsible for rapid and extreme superheating of the electrolyte within the nanopore. The model is implemented numerically with a finite element calculation, yielding a time and spatially resolved temperature distribution in the nanopore region. Temperatures near the thermodynamic limit of superheat are predicted to be attained just before the explosive nucleation of a vapor bubble is observed experimentally. Knowledge of this temperature distribution enables the evaluation of related phenomena including bubble nucleation kinetics, relaxation oscillation, and bubble dynamics.Publication Waveguide for cold atoms: Spin-1 magnetic particles and a filamentary current(American Physical Society (APS), 1996) Berg-Sorensen, Kirstine; Burns, Michael; Golovchenko, Jene; Hau, LeneWe consider a waveguide for cold neutral atoms with a magnetic moment proportional to their spin angular momentum. The waveguide consists of a thin wire carrying a constant current. For the spin-1 case, we find bound states for the two-dimensional part of the motion around the wire, and present numerical and approximate analytic results for these bound states. In an experiment, the bound states can decay due to various effects, and we calculate the time scales involved.Publication Supersymmetry and the Binding of a Magnetic Atom to a Filamentary Current(American Physical Society, 1995) Hau, Lene; Golovchenko, Jene; Burns, MichaelWe suggest the binding of neutral atoms to a current carrying wire through the interaction between the atomic magnetic dipole moment and the wire's magnetic field. The theoretical description is based upon an extension of the concept of supersymmetry to multicomponent wave functions. A solution for spin 1/2 particles is obtained directly in coordinate space. Spin 1 particles are considered as well. Experimentally, the system should be immediately realizable for 25 μK sodium atoms around a wire with a diameter of 0.5 μm and a current of 400 μA.Publication Bound States of Guided Matter Waves: An Atom and a Charged Wire(American Physical Society, 1992) Hau, Lene; Burns, Michael; Golovchenko, JeneWe argue that it is possible to bind a neutral atom in stable orbits around a wire charged by a time-varying sinusoidal voltage. Both classical and quantum-mechanical theories for this system are discussed, and a unified approach to the Kapitza picture of effective potentials associated with high-frequency fields is presented. It appears that cavities and waveguides for neutral-atomic-matter waves may be fashioned from these considerations.Publication Near-Resonant Spatial Images of Confined Bose-Einstein Condensates in a 4-Dee Magnetic Bottle(American Physical Society, 1998) Hau, Lene; Busch, B. D.; Liu, Chien; Dutton, Zachary; Burns, Michael; Golovchenko, JeneWe present quantitative measurements of the spatial density profile of Bose-Einstein condensates of sodium atoms confined in a 4-Dee magnetic bottle. The condensates are imaged in transmission with near-resonant laser light. We demonstrate that the Thomas-Fermi surface of a condensate can be determined to better than 1%. More generally, we obtain excellent agreement with mean-field theory. We conclude that precision measurements of atomic scattering lengths and interactions between phase-separated cold atoms in a harmonic trap can be performed with high precision using this method.