白光超灵敏相位估计
Ultra-sensitive phase estimation with white light
摘要：
Brunner和Simon [Phys. Rev. Lett. 105，010405（2010）]，以表明量子弱测量可以提供一种方法来检测超小的纵向相移，即使是白光。通过在频域中进行分析，我们发现，只要频谱足够大，放大效应就会起作用，而与时域中的行为无关。因此，对于实验实现，可以显著地简化先前的方案。
英文摘要：
An improvement of the scheme by Brunner and Simon [Phys. Rev. Lett. 105, 010405 (2010)] is proposed in order to show that quantum weak measurements can provide a method to detect ultrasmall longitudinal phase shifts, even with white light. By performing an analysis in the frequency domain, we find that the amplification effect will work as long as the spectrum is large enough, irrespective of the behavior in the time domain. As such, the previous scheme can be notably simplified for experimental implementations.
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