Multiloop SQUID Interferometers for Quantum Information Processing

Quantum computing represents a radical shift from classical computing by leveraging the principles of quantum mechanics to process information. Multiqubit interactions are pivotal for quantum computing, enabling the solution of complex problems beyond the reach of classical computers. However, accurately controlling these interactions in a scalable and efficient manner has remained a persistent challenge. Current approaches to controlling multiqubit interactions often incorporate a perturbative method, which is both challenging and inefficient because of the large number of computations needed. Limited control and lack of scalability of these traditional techniques hampers the achievement of high-volume, efficient quantum computing. Moreover, space constraints and susceptibility to noise further impede the performance and reliability of conventional quantum computing systems.

Technology Description

This technology employs structures and techniques based on superconducting Josephson-junction circuits to facilitate the direct engineering of multiple quantum bit (multi-qubit) interactions in a nonperturbative manner. The system incorporated includes a multispin coupler, composed of several loops, each harboring a pair of Josephson junctions. This coupler is inductively linked with a variety of qubits. This implementation utilizes the distinct properties of quantum physics to carry out computing operations, optimizing information processing tasks. Unlike traditional quantum computing approaches, this technology can establish multiple qubit interactions directly and in a nonperturbative fashion. The unique combination of Josephson junctions and a multispin coupler allows for precise control over qubit interactions, thereby enhancing the computational capabilities and reliability of the system. This design overcomes key limitations of the previous systems, ensuring improved scalability and an elevated level of control.