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Phase Estimation with Weak Measurement Using a White Light Source
Xiao-Ye Xua, Yaron Kedemb, Kai Suna c, Lev Vaidman Ab, Chuan-Feng Lia c, Guang‐Can Guoa c
- aKey Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei 230026, People's Republic of China
- bRaymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978, Israel
- cKey Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei 230026, People’s Republic of China
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Abstract
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.