Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei 230026, People's Republic of China.
Phys Rev Lett. 2013 Jul 19;111(3):033604. doi: 10.1103/PhysRevLett.111.033604. Epub 2013 Jul 17.
We report results of a high precision phase estimation based on a weak measurement scheme using a commercial light-emitting diode. The method is based on a measurement of the imaginary part of the weak value of a polarization operator. The imaginary part of the weak value appeared due to the measurement interaction itself. The sensitivity of our method is equivalent to resolving light pulses of the order of a attosecond and it is robust against chromatic dispersion.
我们报告了一种基于弱测量方案的高精度相位估计结果，该方案使用商业发光二极管。该方法基于对偏振算子弱值虚部的测量。弱值的虚部是由于测量相互作用本身引起的。我们的方法的灵敏度相当于分辨阿秒量级的光脉冲，并且对色散具有鲁棒性。
