Quantum enhanced joint measurement of multiple non-commuting observables with SU(1,1) interferometer
arXiv:1712.01553 · doi:10.1364/OE.26.027705
Abstract
Heisenberg uncertainty relation in quantum mechanics sets the limit on the measurement precision of non-commuting observables, which prevents us from measuring them accurately at the same time. In some applications, however, the information are embedded in two or more non-commuting observables. On the other hand, quantum entanglement allows us to infer through Einstein-Podolsky-Rosen correlations two conjugate observables with precision better than what is allowed by Heisenberg uncertainty relation. With the help of the newly developed SU(1,1) interferometer, we implement a scheme to measure jointly information encoded in multiple non-commuting observables of an optical field with a signal-to-noise ratio improvement of about 20 % over the standard quantum limit on all measured quantities simultaneously. This scheme can be generalized to the joint measurement of information in arbitrary number of non-commuting observables.
6 pages, 6 figures
References in corpus (6)
- Generating Entangled Microwave Radiation Over Two Transmission Lines
- Detection loss tolerant supersensitive phase measurement with an SU(1,1) interferometer
- Phase sensing beyond the standard quantum limit with a truncated SU(1,1) interferometer
- Optimal estimation of joint parameters in phase space
- Improving the phase super-sensitivity of squeezing-assisted interferometers by squeeze factor unbalancing
- Joint Multi-Parameter Measurement