By LUCAS LAURSEN and MARGO ANDERSON
For decades, researchers have tried to squeeze quantum signals alongside classical signals in fiber optic cables. Quantum bits, however, are based on delicate quantum states of individual particles, which can be disrupted by thermal noise and other factors.
Last month, Northwestern University engineers sent a pair of entangled photons more than 30 kilometers through a fiber that was also carrying a 400 gigabits-per-second classical signal. The entangled states then enabled a quantum data transfer process called teleportation. Quantum teleportation involves transmitting the quantum state of one particle onto another particle at a distant location, effectively allowing the quantum information (a.k.a. the quantum bits or qubits) to be “teleported” across space.
Continue reading Can Qubits Teleport Through Today’s Internet Lines?