Towards quantum sensing using nonlinear quantum systems

The shot-noise, standard quantum limit and Heisenberg limit in sensing refers to how the imprecision of the estimate scales with the resources. I will outline our recent work on how to generate quantum dynamics which can achieve an imprecision which scales faster than 1/N, where N is the mean photon number of the sensing bosonic mode, i.e. the scheme outperforms the standard Heisenberg limit for metrology. We show how these schemes can be used to perform magnetometry and force sensing with super-Heisenberg scaling in the resource.

This will be a joint QUISA/Physics seminar via zoom.