Affiliation:
1. Beihang University
2. Beijing Academy of Quantum Information Sciences
Abstract
The measurement sensitivity of a cavity could be enhanced for sensing applications in an anomalous dispersion condition. In this paper, we find that when injecting a squeezed vacuum light into a dispersive cavity, the sensitivity could be improved further, even beating the standard quantum limit at the detuning frequencies via controlling the dispersion condition. It is amazing that normal dispersion is superior to anomalous dispersion in improving the measurement sensitivity in the presence of a squeezed vacuum field. It implies this paper could be used to realize high-precision sensing applications.
Funder
Beijing Academy of Quantum Information Sciences
National Natural Science Foundation of China
Subject
Atomic and Molecular Physics, and Optics,Statistical and Nonlinear Physics