Optimal orientation detection of an anisotropic dipolar scatterer
arXiv:2109.08444 · doi:10.1103/PhysRevA.105.053504
Abstract
The angular orientation of an anisotropic scatterer with cylindrical symmetry in a linearly polarized light field represents an optomechanical librator. Here, we propose and theoretically analyze an optimal measurement scheme for the two angular degrees of freedom of such a librator. The imprecision-backaction product of this scheme reaches the Heisenberg uncertainty limit. Furthermore, we propose and analyze a realistic measurement scheme and show that, in the absence of spinning motion around the symmetry axis, measurement-based ground-state cooling of the rotational degrees of freedom of an anisotropic point scatterer levitated in an optical trap is feasible.
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Cited by in corpus (5)
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- Continuity Equation for the Flow of Fisher Information in Wave Scattering
- Measurement of single nanoparticle anisotropy by laser induced optical alignment and Rayleigh scattering for determining particle morphology
- Quantum-limited optical lever measurement of a torsion oscillator
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