Quantum Information in Quantum Imaging

The principles of quantum mechanics are being used to achieve a new paradigm in metrology, the science of measurement.This *quantum metrology* increases precision which in turn (i) reveals foundational insight in quantum information theoryand (ii) promises the next evolution in sensors.

Single parameter estimation (e.g. interferometry) is widely investigated andthe optimal resources and classes of measurements are identified.

This maturity now allows application of the rigour ofquantum metrology to other fields, such as quantum imaging — including imaging without detection techniques — andquantum process tomography.

The challenge is to extend the quantum metrology framework to multiple parameterestimation, requiring theoretical and experimental effort to explore and identify the optimal resources and classes ofmeasurements.I propose a novel scheme for full quantum process tomography, using multi-parameter quantum metrology combined withthe imaging without detection technique.

This unites previously disparate fields to achieve a new paradigm of quantummeasurement physics and precision sensing technology.

I will adapt and modify ghost-imaging schemes for simultaneousobject estimation, investigate the role of nonclassical correlations to deepen understanding of quantum measurements andits information extracting capabilities. This project accelerates standard quantum metrology that until now has focused onsingle parameters and single objects.

I will use free-space quantum optics for proof-of principle experiments and integratedsilicon quantum photonics to reach higher levels of complexity and capability.The project unites my expertise in quantum foundations, quantum resources and ultra-high efficiency photon sources, withthe experimental expertise of Dr Jonathan Matthews and colleagues of the Centre for Quantum Photonics, Bristol University— world leaders in integrated quantum photonics and photonic quantum technology.