Researchers have demonstrated one of the key steps in building the architecture for modular quantum computers: the 'teleportation' of a quantum gate between two qubits, on demand. The key principle behind this new work is quantum teleportation, a unique feature of quantum mechanics that has previously been used to transmit unknown quantum states between two parties without physically sending the state itself.
Yale University researchers are investigating a modular approach to quantum computing. Modularity, which is found in everything from the organization of a biological cell to the network of engines in the latest SpaceX rocket, has proved to be a powerful strategy for building large, complex systems, the researchers say.
A quantum modular architecture consists of a collection of modules that function as small quantum processors connected into a larger network. Quantum calculations are done via delicate bits of data called qubits, which are prone to errors. In experimental quantum systems, "logical" qubits are monitored by "ancillary" qubits in order to detect and correct errors immediately.