Simple Laser Delivers High-Dimensional, Quantum-Like Classical Light

An international team from China and South Africa used a laser to create an arbitrary dimensional light that team members characterized as “quantum like.” Using a simple laser commonly available in university teaching labs, the team showed eight-dimensional, classically entangled light. The demonstration builds on existing properties and principles of light structuring, pushing the limits of the field by charting a course for higher (more than two) dimensions that constrain a qubit quantum state. The research and a tomography technique that the researchers developed to measure high-dimensional, classically entangled light support future developments in quantum metrology, optical communications, quantum error correction,...