Effects of losses on the sensitivity of an actively correlated Mach-Zehnder interferometer
arXiv:2103.05868 · doi:10.1103/PhysRevA.104.013725
Abstract
We theoretically studied the quantum Cramér-Rao bound of an actively correlated Mach-Zehnder interferometer (ACMZI), where the quantum Fisher information obtained by the phase-averaging method can give the proper phase-sensing limit without any external phase reference. We numerically calculate the phase sensitivities with the method of homodyne detection and intensity detection in the presence of losses. Under lossless and very low loss conditions, the ACMZI is operated in a balanced case to beat the standard quantum limit (SQL). As the loss increases, the reduction in sensitivity increases. However within a certain range, we can adjust the gain parameters of the beam recombination process to reduce the reduction in sensitivity and realize the sensitivity can continue to beat the SQL in an unbalanced situation. Our scheme provides an optimization method of phase estimation in the presence of losses.
References in corpus (27)
- Advances in Quantum Metrology
- Quantum Interferometric Optical Lithography: Exploiting Entanglement to Beat The Diffraction Limit
- Quantum Optical Metrology -- The Lowdown on High-N00N States
- Generalized uncertainty relations: Theory, examples, and Lorentz invariance
- Quantum Metrology with Two-Mode Squeezed Vacuum: Parity Detection Beats the Heisenberg Limit
- Quantum-Enhanced Sensing Based on Time Reversal of Nonlinear Dynamics
- Quantum optical technologies for metrology, sensing and imaging
- Quantum interferometry with and without an external phase reference
- Detection loss tolerant supersensitive phase measurement with an SU(1,1) interferometer
- Coherent-Light Boosted, Super-Sensitive, Quantum Interferometry
- Phase sensing beyond the standard quantum limit with a truncated SU(1,1) interferometer
- The phase sensitivity of an SU(1,1) interferometer with homodyne detection
- Phase sensitivity at the Heisenberg limit in an SU(1,1) interferometer via parity detection
- Gaussian state interferometry with passive and active elements
- Spin-mixing Interferometry with Bose-Einstein Condensates
- Fundamental precision limit of a Mach-Zehnder interferometric sensor when one of the inputs is the vacuum
- Reframing SU(1,1) interferometry
- Engineering the Frequency Spectrum of Bright Squeezed Vacuum via Group Velocity Dispersion in an SU(1,1) Interferometer
- Optimized phase sensing in a truncated SU(1,1) interferometer
- Intramode correlations enhanced phase sensitivities in an SU(1,1) interferometer
- Phase sensitivity of gain-unbalanced nonlinear interferometers
- Absolute sensitivity of phase measurement in an SU(1,1) type interferometer
- Toward demonstrating super-sensitive angular displacement estimation by using orbital angular momentum coherent state and SU(1,1)-SU(2) hybrid interferometer
- Nonlinear phase estimation enhanced by an actively correlated Mach-Zehnder interferometer
- Effects of losses in the hybrid atom-light interferometer
- Phase estimation for an SU(1,1) interferometer in the presence of phase diffusion and photon losses
- Atom-light superposition oscillation and Ramsey-like atom-light interferometer