Mesoscopic quantum science and metrology with levitated mechanical systems

Project: Research project

Project Details


The first major effort will be to controllably synthesize (Pauzauskie) non-spherical (rod- and disc-shaped) particles with well-defined crystallographic phases for controlling and cooling torsional and rotational motion in optical traps (Geraci,Kane, Vamivakas). New possibilities opened up by the
mechanical oscillator’s in situ tunability and the coupling among the translational, torsional, and rotational motion will be developed (Bhattacharya). In parallel, investigation of flexural modes of levitated
membranes is especially interesting for studies of mechanical systems in the quantum regime, since the frequencies of micron-scale particles can be of order 100 MHz or greater, and can be adjusted by rotation-induced
tension. Understanding the loss mechanisms of these modes and how they relate to the material properties of
the levitated membrane will be a major goal of initial
research. Finally, we will explore the magnetic levitation
of LHe drops and the coupling between their Hz-scale
rotations, kHz-scale surface waves, and MHz-scale acoustic waves. All of these modes can be optically controlled due to LHe’s extreme mechanical compliance and the drop's ability to store large photon numbers
within its optical whispering gallery modes. This should
be an ideal system in which to use "optical dilution" to reach the ground state (Harris, Bhattacharya). The goal of these efforts will be to implement protocols for active and passive cooling that utilize the individual and the coupled DOFs. An exciting path to emerge will be the first experimental investigations into rotational mechanics
and the quantum physics of levitated harmonic oscillators and rigid rotors
Effective start/end date6/1/185/31/22


  • University of Rochester (417315/URFAO: GR510772 AMD. 6 // N00014-18-1-2370)
  • Office of Naval Research (417315/URFAO: GR510772 AMD. 6 // N00014-18-1-2370)


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