Optomechanical weak-force sensing

In this project we will analyse weak-force sensing based on optomechanical systems. Such systems offer significant promise for sensing weak electric and magnetic fields, gravitational fields, and even single spins and biosensing. One specific area that is relevant for nanotechnology is sensing of short-range forces such as the Casimir effect. Moreover, unification theories predict an additional force term to the Newtonian gravitational force. Often this phenomenon is referred to as non-Newtonian Gravity and the Yukawa potential is the most cited from of it. In this project we propose a setup that is able to set further constrains on the parameter of the additional Yukawa term. We present an optomechanical setup that consists of a disk with test masses and a reflective membrane separated less than a millimetre from each other. The membrane interacts with the test masses via the gravitational force and changes its oscillation state. The varying oscillation state of the membrane is read out via homodyne detection and gives rise to quantum optical approaches to enhance the readout capabilities. The effect of other undesired forces is also discussed and methods to reduce their effects. This project can have impact to improve nanotechnology and sensing quite broadly, as well as have more direct impact in the MEMS and optomechanical sensing communities.

The main impact of the proposed Hub will be in training quantum engineers with a skillset to understand cutting-edge quantum research and a mindset toward developing this innovation, and the entrepreneurial skills to lead the market. This will grow the UK capacity in quantum technology. Through our programme, we nurture the best possible work force who can start new business in quantum technology. Our programme will provide multi-level skills training in quantum engineering in order to enhance the UK quantum technologies landscape at several stages. Through the training we will produce quantum engineers with training in innovation and entrepreneurship who will go into industry or quantum technology research positions with an understanding of innovation in quantum technology, and will bridge the gap between the quantum physicist and the classical engineer to accelerate quantum technology research and development. Our graduates will have to be entrepreneurial to start new business in quantum technology. By providing late-stage training for current researchers and engineers in industry, we will enhance the current landscape of the quantum technology industry. After the initial training composed of advanced course works, placements and short projects, our students will act as a catalyzer for collaboration among quantum technology researchers, which will accelerate the development of quantum technology in the UK. Our model actively encourages collaboration and partnerships between Imperial and national quantum tehcnology centres and we will continue to maintain the strong ties we have developed through the Centre for Doctoral Training in order to enhance our on-going training provisions. The Hub will also have an emphasis on industrial involvement. Through our new partnerships students will be exposed to a broad spectrum of non-academic research opportunities. An important impact of the Hub is in the research performed by the young researchers, PhD students and junior fellows. They will greatly enhance the research capacity in quantum technology. Imperial College has many leading engineers and quantum scientists. One of the important outcomes we expect through this Hub programme is for these academics to work together to translate the revolutionary ideas in quantum science to engineering and the market place. We also aim to influence industry and policy makers through our outreach programme in order to improve their awareness of this disruptive technology.