Photons, the tiniest packets of electromagnetic energy, can carry information across quantum networks. Each photon has various properties, like path, polarization, and frequency, which can hold quantum information.
When photons are connected through entanglement, techniques like quantum teleportation are enabled. However, this connection is very sensitive to environmental conditions, which can cause errors.
Oak Ridge National Laboratory researchers found that hyperentanglement (entangling multiple properties of two photons) can make communication more reliable. They created a new quantum gate that works with two properties of photons — polarization and frequency. This, combined with hyperentanglement, could reduce errors in quantum communication and help build…