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

• URL: http://arxiv.org/abs/2407.15813v1
• Date: Mon, 22 Jul 2024 17:24:27 GMT
• Title: Gyroscopic stability for nanoparticles in Stern-Gerlach Interferometry and spin contrast
• Authors: Tian Zhou, Sougato Bose, Anupam Mazumdar,
• Abstract summary: We investigate the role of rotation in a matter-wave interferometer, where we show that imparting angular momentum along the direction of a defect can cause an enhancement in spin contrast. 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.
• Score: 2.569338891678463
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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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