53,489 research outputs found
Wigner Function Reconstruction in Levitated Optomechanics
We demonstrate the reconstruction of the Wigner function from marginal
distributions of the motion of a single trapped particle using homodyne
detection. We show that it is possible to generate quantum states of levitated
optomechanical systems even under the effect of continuous measurement by the
trapping laser light. We describe the opto-mechanical coupling for the case of
the particle trapped by a free-space focused laser beam, explicitly for the
case without an optical cavity. We use the scheme to reconstruct the Wigner
function of experimental data in perfect agreement with the expected Gaussian
distribution of a thermal state of motion. This opens a route for quantum state
preparation in levitated optomechanics.Comment: 9 pages, 3 figure
Magnetic Suspension and Balance Systems: A Comprehensive, Annotated Bibliography
This bibliography contains 301 entries. Results are reported of recent studies aimed at increasing the research capabilities of magnetic suspension and balance systems; e.g., increasing force and torque capability, increasing angle of attack capability, and increasing overall system reliability. The problem is addressed of scaling from the relatively small size of existing systems to much larger sizes. The purpose of the bibliography is to provide an up-to-date list of publications that might be helpful to persons interested in magnetic suspension and balance systems for use in wind tunnels. The arrangement is generally chronological by date of presentation. However, papers presented at conferences or meetings are placed under dates of presentation. The numbers assigned to many of the citations have been changed from those used in the previous bibliography. This has been done in order to allow outdated citations to be removed and some recently discovered older works to be included in their proper chronological order. Author, source, and subject indexes are included in order to increase the usefulness of this compilation
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