Using More Than Polarization to Encode Photons
Qubits, quantum bits, are photons manipulated to encode data. Predominantly, the photons are encoded in a binary sense. Increasing the qubit data capacity is challenging. However, there is promise in increasing the variance beyond that of binary encoding. Experimental, high-dimensional qubit encoding is nascent, to say the least. However, this team from Tsinghua University, Beijing, has developed a multi-dimensional quantum system with some promise to speed up the quantum internet.