0
views
0
recommends
+1 Recommend
0 collections
0
shares
• Record: found
• Abstract: found
• Article: found
Is Open Access

# Search for exotic spin-dependent interactions using polarized helium

Preprint

, ,

Bookmark
There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

### Abstract

We investigate the sensitivity of a search for exotic spin-dependent interactions using polarized $$^{3}$$He with unpolarized mass of BGO and polarized mass of DyIG. The spin-dependent interactions between the polarized nuclear spins of $$^3$$He and the mass induces an effective magnetic field, causing the frequency shift to the precession of $$^{3}$$He. The signal of the $$^{3}$$He nuclear spins can be measured using optically pumped magnetometers which is the most sensitive noncryogenic magnetic-field sensor. A careful design using gradiometers or co-magnetometers can help to reduce the systematics and explore different spin-dependent interactions. An alternative approach is the resonance method proposed by Arvanitaki and Geraci [Phys. Rev. Lett. 113, 161801 (2014)]. The mass movement is modulated at the frequency equal to the Larmor frequency of $$^3$$He. The effective magnetic field induced by spin-dependent interactions can rotate the $$^3$$He nuclear spins. For a given ultra-long relaxation time of polarized $$^3$$He spins, this resonance method could be sensitive to the magnetic field much below $$1$$ fT. If the resonance method works, the sensitivity of the spin-dependent interactions can be significantly improved over existing experiments, and new limits on the coupling strengths can be set in the interaction range below $$10^{-1}$$ m.

### Author and article information

###### Journal
06 February 2020
###### Article
2002.02495