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B66: DAMOP: Hybrid Quantum Systems I

Room 413

Sponsoring Units: DAMOPChair: Sohail Dasgupta, Rice UniversitySession Type:
  • Focus

Mon. March 6, 2:06 p.m. – 2:18 p.m. PST

Room 413

Magnetically-levitated superconducting microparticles make a promising system for probing quantum physics in unexplored high-mass regimes of ~1μg~1018amu [1]. We show initial steps in this direction. We trap a superconducting microparticle and aim to prepare its COM motion in quantum states. Our particle acts as an ideal diamagnet and is confined in a passive magnetic trap formed by superconducting currents. We use all-magnetic trapping, detection and feedback to avoid several limitations of optical levitation. Our system [2,3] is well isolated from the surroundings, in a dilution refrigerator at temperatures <100mK. Our magnetic trap’s and detection coils are microfabricated on a chip, which enables flexible control of the trapping potential, high and stable detection efficiencies and the potential to scale-up our system to an array of magnetically-levitated inertial sensors.


Our immediate goal is to cool a magnetically-levitated particle to the ground state, and from there to study quantum states of motion. To this end, we also aim to couple the particle's motion to a flux-tunable superconducting microwave resonator - which offers a higher read-out sensitivity – and facilitates access to the rich toolbox of optomechanical control protocols.


Presented By

  • Gerard Higgins (Chalmers University of Technology)


  • Gerard Higgins (Chalmers University of Technology)
  • Martí Gutierrez Latorre (Chalmers University of Technology)
  • Achintya Paradkar (Chalmers University of Technology)
  • Anton Söderqvist (Chalmers University of Technology)
  • Fabian Resare (Chalmers University of Technology)
  • Witlef Wieczorek (Chalmers Univ of Tech)