We investigate the utility of parity detection to achieve Heisenberg-limited phase estimation for optical interferometry. We consider the parity detection with several input states that have been shown to exhibit sub-shot-noise interferometry with their respective detection schemes. We show that with parity detection, all these states achieve the sub-shot-noise limited phase uncertainty. Thus making the parity detection a unified detection strategy for quantum optical metrology. We also consider quantum states that are a combination of a NOON state and a dual-Fock state, which gives a great deal of freedom in the preparation of the input state, and is found to surpass the shot-noise limit. © 2011 Taylor & Francis.
Publication Source (Journal or Book title)
Journal of Modern Optics
Chiruvelli, A., & Lee, H. (2011). Parity measurements in quantum optical metrology. Journal of Modern Optics, 58 (11), 945-953. https://doi.org/10.1080/09500340.2011.585251