7 papers
First Search for Ultraheavy Dark Matter Using a Magnetically Levitated Particle
Dennis G. Uitenbroek, Dorian W. P. Amaral, Juehang Qin +4
We present the first search for ultraheavy dark matter using a magnetically levitated particle. The POLONAISE experiment uses a milligram-scale ferromagnet levitated in a supercond…
Picometer control of a levitating milligram gravity sensor
Dennis G. Uitenbroek, Jurriaan Langendorff, Tjerk H. Oosterkamp
Due to their exceptional isolation from the environment, magnetically levitated particles are explored as extremely sensitive mechanical sensors. For future gravity experiments on…
Electrostatic transfer of sub-micron magnetic particles onto cantilevers using a focused ion beam system
Peter Sun, George R. Du Laney, Tim M. Fuchs +3
In this paper, we present a focused-ion-beam-assisted method for preparing magnet tips for magnetic resonance force microscopy measurements. The method electrostatically transfers…
A Sub-kHz Mechanical Resonator Passively Cooled to 6 mK
Loek van Everdingen, Jaimy Plugge, Tim Fuchs +6
Highly coherent mechanical resonators are invaluable to ultrasensitive detection techniques by enabling detection of small forces. Studying mechanical resonators in a thermal equil…
Superconducting flux concentrator coils for levitation of particles in the Meissner state
Robert Smit, Martijn Janse, Eli van der Bent +5
Magnetic levitation of superconductors is a promising platform to study quantum mechanics in the large-mass limit. One major limitation is the weak trapping potential, which result…
First Search for Ultralight Dark Matter Using a Magnetically Levitated Particle
Dorian W. P. Amaral, Dennis G. Uitenbroek, Tjerk H. Oosterkamp +1
We perform the first search for ultralight dark matter using a magnetically levitated particle. A sub-millimeter permanent magnet is levitated in a superconducting trap with a meas…