Four-Wave Mixing at peV Energy Scales
Abstract
We measure the nonlinear magnetic susceptibility đ(3) of the disordered quantum Ising magnet LiHo0.045â˘Y0.955â˘F4 and demonstrate four-wave mixing due to coherent (anti-)Stokes Raman scattering at âź100ââHz (peV) energy scales. The temperature dependence of đ(3) approximately follows a (1/đ) form, with a high-đ cutoff that can be linked to dissipation in the coherent spin clusters. đ(3) also decreases monotonically with a transverse field, approaching a constant offset above a few kOe, suggesting the presence of both coherent and spontaneous Raman scattering.
Copyright and License
Š 2025 American Physical Society.
Acknowledgement
We are grateful to G. Refael and P.âC.âE. Stamp for thought-provoking discussions. This work was supported by the U.S. Air Force Office of Scientific Research, Grant No. FA9550-25-1-0017.
Supplemental Material
The Supplemental Material contains additional information about the experimental apparatus, data analysis procedure, and a review of the theoretical model underpinning the understanding of the data.
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Additional details
- United States Air Force Office of Scientific Research
- FA9550-25-1-0017
- Accepted
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2025-01-24Accepted
- Publication Status
- Published