Parallel Information Transfer in a Multi-Node Quantum Information Processor

Understand

We describe a method for coupling disjoint quantum bits (qubits) in different local processing nodes of a distributed node quantum information processor.

• An effective channel for information transfer between nodes is obtained by moving the system into an interaction frame where all pairs of cross-node qubits are effectively coupled via an exchange interaction between actuator elements of each node.
• All control is achieved via actuator-only modulation, leading to fast implementations of a universal set of internode quantum gates.
• The method is expected to be nearly independent of actuator decoherence and may be made insensitive to experimental variations of system parameters by appropriate design of control sequences.