Searching for New Spin-Dependent Interactions with SmCo${}_5$ Spin Sources and a SERF Comagnetometer

Abstract

We propose a novel method to search for possible new macro-scale spin- and/or velocity-dependent forces (SVDFs) based on specially designed SmCo${}_5$ spin sources and a spin exchange relaxation-free (SERF) comagnetometer. A simulation shows that, by covering a SmCo${}_5$ permanent magnet with a layer of pure iron, a high net spin density source of about $1\times 10^{22}$/cm${}^3$ could be obtained. Taking advantages of the high spin density of this iron-shielded SmCo${}_5$ and the high sensitivity of the SERF, the proposed method could set up new limits of greater than 10 orders of magnitude more sensitive than those from previous experiments or proposals in exploring SVDFs in force ranges larger than 1 cm.

5 pages, 3 figures

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Cited by in corpus (14)

• New Constraints on Exotic Spin-Velocity-Dependent Interactions
• Revisiting spin-dependent forces mediated by new bosons: Potentials in the coordinate-space representation for macroscopic- and atomic-scale experiments
• New limits on Anomalous Spin-Spin Interactions
• New Experimental Limits on Exotic Spin-Spin-Velocity-Dependent Interactions By Using SmCo${}_5$ Spin Sources
• Application of Spin-Exchange Relaxation-Free Magnetometry to the Cosmic Axion Spin Precession Experiment
• Spin-dependent exotic interactions
• Constraints on Spin-Spin-Velocity-Dependent Interaction
• Probing New Physics with Long-Range Neutrino Interactions: An Effective Field Theory Approach
• Pseudovector and pseudoscalar spin-dependent interactions in atoms
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• Constraints on Velocity and Spin Dependent Exotic Interaction at the Millimeter Scale with a Diamagnetic-levitated Force Sensor
• Searching for Dark Matter Particles with Compton Scattering Approach
• Frequency responses of the K-Rb-${}^{21}$Ne co-magnetometer