非线性光学晶体中热涨落引起的额外相位噪声
Extra phase noise from thermal fluctuations in nonlinear optical crystals
摘要：
我们从理论和实验上证明了二阶非线性晶体中热声子的散射光是光学参量振荡器中观察到的附加相位噪声的来源。这种额外的相位噪声降低了量子关联，并且迄今为止阻碍了在单个非线性光学系统中直接产生多体纠缠。我们冷却非线性晶体，并观察到额外的噪音减少。我们对这种噪声的处理可以成功地应用于文献中的不同系统。
英文摘要：
We show theoretically and experimentally that scattered light by thermal phonons inside a second-order nonlinear crystal is the source of additional phase noise observed in Optical Parametric Oscillators. This additional phase noise reduces the quantum correlations and has hitherto hindered the direct production of multipartite entanglement in a single nonlinear optical system. We cooled the nonlinear crystal and observed a reduction of the extra noise. Our treatment of this noise can be successfully applied to different systems in the literature.
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