Linear Optical Implementations of Quantum Computers

Information processing with light is ubiquitous, from communication, metrology and imaging to computing. When we consider light as a quantum mechanical object, new ways of information processing become possible. We can use quantum nonlocality (entanglement) to perform secure communication, high-precision measurements, high-resolution imaging, and even build a quantum computer that can perform certain important tasks much more efficiently than ordinary computers. We are investigating how quantum repeaters can extend the reach of quantum communication protocols and may some day lead to the Quantum Internet. We study how arrangements of light emitters can be used to monitor deformations of the material upon which they are placed with exquisite precision and how quantum measurement techniques can be used to measure very precisely the shape and size of objects. We are developing new ways of creating entanglement and nonlocality between atoms and photons in waveguides and on chips. This will allow us to reliably create the necessary resources for a large-scale quantum computer that can be connected to the Quantum Internet.

This is just one example of the sort of project that might be available in this research group. The precise project will be decided upon in consultation with the supervisor.