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  • Strong coupling and dark modes in the motion of a pair of levitated . . .
    Remarkably, we show the emergence of dark modes in the overall coupled motion The dynamics can be described in terms of spin-1 2 matrices, and the observed features are ubiquitous in a variety of classical and quantum systems
  • Torsional Optomechanics of a Levitated Nonspherical Nanoparticle
    Here we report the first experimental observation of the torsional vibration of an optically levitated nonspherical nanoparticle in vacuum We achieve this by utilizing the coupling between the spin angular momentum of photons and the torsional vibration of a nonspherical nanoparticle whose polarizability is a tensor
  • Angular Control of Levitated Magnetic Particles for Studies of . . .
    Our approach: levitated diamonds embedded with NV centers Angularly stable diamond 10-20 micron size diamond Electrostatic levitation Libration frequencies: ~100Hz-1kHz Spin degree of freedom: the NV center Long coherence time: 1μs (300K) Easily tunable NV centers ensemble: N=109 Coupling: the magnetic torque Spin anisotropy
  • Optically Levitated Nanodumbbell Torsion Balance and GHz Nanomechanical . . .
    Recently, a novel ultrasensitive torsion balance with an optically levitated nonspherical nanoparticle was proposed [17], utilizing the coupling between the spin angular momentum of photons and the mechanical motion of the nanoparticle [4,1720]
  • Spin-rotational coupling in levitated nanodiamonds
    This project falls within the field of levitated optomechanics, focusing on experiments involving nanodiamond particles with nitrogen-vacancy (NV) quantum defects The aim is to explore the coupling between the internal spin degrees of freedom of the NV centres and the particle's motion, with the objective of creating macroscopic quantum states
  • Strong coupling and dark modes in the motion of a pair of levitated . . .
    A recent work Vijayan2024Cavity-mediated showed strong coupling between pairs of collinear oscillation modes of two levitated nanoparticles
  • On-chip Levitated Spin-optomechanics - hammer. purdue. edu
    Researching with levitated particles has become a fascinating topic in recent years Either optical trap or ion trap provides a contactless platform for studying fundamental and quantum physics, including ultrasensitive force and torque sensors, microscopic thermodynamics, spin-cooling of the motion, optomechanical coupling, and quantum ground-state cooling The latter offers promising
  • Large quantum superpositions of a levitated nanodiamond through spin . . .
    The proposed method allows the generation of large superpositions of nanoparticles with millions of atoms and the observation of the associated spatial quantum interference under reasonable experimental conditions




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