拯救Unruh信号：利用纠缠探测器相干地抵消自发辐射
Saving the Unruh Signal: Coherent Cancellation of Spontaneous Emission with Entangled Detectors
AI总结：
通过多探测器纠缠干涉技术，实现对Unruh效应中主导噪声的相干抵消，从而拯救Unruh信号。
摘要：
Unruh效应 notoriously 非常难以检测，因为它被Wigner-Weisskopf自发辐射所指数级压制。我们显示，通过利用多探测器量子干涉，这个基本障碍可以被克服。通过准备一个特定的W态三体纠缠Unruh-DeWitt探测器系统，自发辐射通道可以被强迫发生破坏性干涉并消失，从而通过相干地沉默这个主导噪声来“拯救”Unruh信号。我们的核心结果是推导出完全且同时抵消所有右行和左行发射模式的条件。我们发现这需要将探测器准备在一种独特的纠缠态中，其实值系数由一个优雅的几何约束决定，即由探测器加速度的对数的正弦比值决定。这项工作确立了多探测器纠缠作为相对论量子设置中噪声抵消的精密工具，为Unruh信号的最终观测开辟了新的途径。
英文摘要：
The Unruh effect is notoriously difficult to detect, as it is exponentially overwhelmed by Wigner--Weisskopf spontaneous emission. We show that this fundamental obstacle can be overcome by harnessing multi-detector quantum interference. By preparing a system of three entangled Unruh--DeWitt detectors in a specific W-state, the spontaneous emission channels can be forced to destructively interfere and vanish, thereby "saving" the Unruh signal by coherently silencing this dominant noise. Our central result is the derivation of the condition for complete and simultaneous cancellation of all right- and left-traveling emission modes. We find this requires preparing the detectors in a unique entangled state whose real-valued coefficients are fixed by an elegant geometric constraint, given by a ratio of sines of the logarithms of the detector accelerations. This work establishes multi-detector entanglement as a precision tool for noise cancellation in relativistic quantum settings, offering a new pathway toward the definitive observation of the Unruh signal.
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