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Gyroscopic stability for nanoparticles in Stern-Gerlach Interferometry and spin contrast

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arxiv 2407.15813 v2 pith:UVXX7DTR submitted 2024-07-22 quant-ph

Tian Zhou , Sougato Bose , Anupam Mazumdar This is my paper · ORCID
classification quant-ph
keywords quantumangularmomentumnanodiamondcontrastinterferometermatter-wavespatial
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abstract

Creating macroscopic spatial quantum superposition with a nanoparticle has a multitude of applications, ranging from testing the foundations of quantum mechanics, matter-wave interferometer for detecting gravitational waves and probing the electromagnetic vacuum, dark matter detection and quantum sensors to testing the quantum nature of gravity in a lab. In this paper, we investigate the role of rotation in a matter-wave interferometer, where we show that imparting angular momentum along the direction of a defect, such as one present in the nitrogen-vacancy centre of a nanodiamond can cause an enhancement in spin contrast for a wide-ranging value of the angular momentum, e.g. $10^{3}-10^{6}$~Hz for a mass of order $10^{-14}-10^{-17}$ Kg nanodiamond. Furthermore, the imparted angular momentum can enhance the spatial superposition by almost a factor of two and possibly average out any potential permanent dipoles in the nanodiamond.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Destructive Interference of Inertial Noise in Matter-wave Interferometry

    quant-ph 2025-06 conditional novelty 6.0 of 10

    A theory shows that cross-correlated two-dimensional vibration noise in a matter-wave interferometer can be tuned to suppress dephasing by roughly the Q-factor of the noise.

  2. Rotational stability in nanorotor and spin contrast in one-loop interferometry in the Stern-Gerlach setup

    quant-ph 2024-12 conditional novelty 5.0 of 10

    Spinning a cylindrical nanorotor along the magnetic field stabilizes its libration mode and suppresses spin-contrast loss in one-loop Stern-Gerlach interferometry, extending prior work from spheres to cylinders.

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