Quantum light engineering for imaging, sensing, and fundamental physics

About the Project

When using classical light, optical measurements and light-based sensing methods are limited by the unavoidable quantum fluctuations in phase and amplitude, also known as shot noise. It is possible to work around this limitation by engineering quantum light whose fluctuations on the phase or the amplitude have been reduced below the quantum noise limit (squeezed light).

This project aims to leverage the realisation of a multi-spatial-mode light squeezer in our laboratory for quantum imaging applications. This unique capability means that light beams can be squeezed locally at every point of their transverse profile. It is akin to ordering the photons inside the beam of light in order to remove the “quantum roughness” across the beam. In particular, we seek to develop new methods to produce squeezed light which will make the next generation of atom magnetometers more sensitive and capable of imaging small currents in the human brain or identify unknown substances at a distance. There are also more fundamental questions about the physics of the quantum states of lights that could be investigated.

This project is suitable for a student with a strong taste for quantum mechanics, interested in quantum optics, and willing to stretch their experimental skills, particularly in optics and laser physics. This is a human-scale experiment where you will have ample opportunities to learn a wide range of topics, from advanced experimental optics to quantum information theory. You will work in a small team and will be able to make a difference.

https://quantumoptics.org.uk/

The School of Physics and Astronomy is an Institute of Physics Juno Champion since 2014 and holder of the Athena SWAN Silver Award. Both initiatives recognise the School’s commitment to promote diversity and equality, and to encourage better practice for all members of the community, whilst also working towards developing an equitable working culture in which all students and staff can achieve their full potential. We welcome applications from all qualified applicants, and encourage applications from traditionally under-represented groups in physics and astronomy.