Experimental high-dimensional two-photon entanglement and violations of generalised Bell inequalities

Understand

Quantum entanglement plays a vital role in many quantum information and communication tasks.

• Entangled states of higher dimensional systems are of great interest due to the extended possibilities they provide.
• For example, they allow the realisation of new types of quantum information schemes that can offer higher information-density coding and greater resilience to errors than can be achieved with entangled two-dimensional systems.
• Closing the detection loophole in Bell test experiments is also more experimentally feasible when higher dimensional entangled systems are used.