Open AccessEffects of imperfect elements on resolution and sensitivity of quantum metrology using two-mode squeezed vacuum state
Author(s) -
Jiandong Zhang,
Zijing Zhang,
Longzhu Cen,
M. Yu,
Shuo Li,
Feng Wang,
Yuan Zhao
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.024907
Subject(s) - optics , physics , quantum metrology , sensitivity (control systems) , rotation (mathematics) , squeezed coherent state , phase (matter) , heisenberg limit , quantum limit , metrology , quantum optics , transmission (telecommunications) , vacuum state , signal (programming language) , quantum , quantum information , coherent states , quantum mechanics , telecommunications , computer science , electronic engineering , quantum network , artificial intelligence , engineering , programming language
It has been demonstrated that using two-mode squeezed vacuum state for phase estimation can break the Heisenberg limit. Our results reveal that the two-mode squeezed vacuum state is also applied to the optical rotation angle measurement. In our scheme, the resolution and sensitivity of the optical rotation angle signal are the same as the case of phase estimation. For the parameter estimation, phase or rotation angle, we discuss the influences of several imperfect factors on the resolution and sensitivity. First, the effect that the upper limit of photon-number resolving has on the maximum amount of available quantum Fisher information has been analyzed. Then, we have also studied the impacts of both the transmission efficiency in the transmission process and the detection efficiency on the detection results. Finally, conditions where all of the above imperfect elements are taken into account at the same time have also been explored. Additionally, other imperfect factors such as squeezing efficiency and dark counts are briefly discussed.