Coherent mixed with squeezed vacuum light interferometry: Parity detection hits the Heisenberg limit
Document Type
Conference Proceeding
Publication Date
4-26-2012
Abstract
Mach-Zehnder interferometry based on mixing the coherent and the squeezed vacuum states of light has Heisenberg limited capabilities for phase estimation. This is so, because the quantum Cramer-Rao bound on sensitivity of phase estimation with the above interferometric scheme reaches the Heisenberg limit when the inputs are mixed in near equal proportions. We show that a detection strategy based on the measurement of parity of photon number in one of the output modes of the interferometer saturates the quantum Cramer-Rao bound of the interferometric scheme, and therefore-as a consequence-hits the Heisenberg limit when the inputs are mixed in equal intensities. © 2012 SPIE.
Publication Source (Journal or Book title)
Proceedings of SPIE - The International Society for Optical Engineering
Recommended Citation
Seshadreesan, K., Anisimov, P., Lee, H., & Dowling, J. (2012). Coherent mixed with squeezed vacuum light interferometry: Parity detection hits the Heisenberg limit. Proceedings of SPIE - The International Society for Optical Engineering, 8272 https://doi.org/10.1117/12.910803