Four-Wave Mixing at peV Energy Scales.

• Tác giả: T F Rosenbaum, D M Silevitch, C Simon
• Ngôn ngữ: eng
• Ký hiệu phân loại: 944.082 Period of Fourth Republic, 1945-1958
• Thông tin xuất bản: United States : Physical review letters , 2025
• Bộ sưu tập: NCBI
• ID: 707561
• Chủ đề: 1. Four; 2. Wave; 3. Mixing

Tóm tắt

We measure the nonlinear magnetic susceptibility χ^{(3)} of the disordered quantum Ising magnet LiHo_{0.045}Y_{0.955}F_{4} and demonstrate four-wave mixing due to coherent (anti-)Stokes Raman scattering at ∼100  Hz (peV) energy scales. The temperature dependence of χ^{(3)} approximately follows a (1/T) form, with a high-T cutoff that can be linked to dissipation in the coherent spin clusters. χ^{(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.