21 Apr 2020 | Morten Kjaergaard, Mollie E. Schwartz, Jochen Braumüller, Philip Krantz, Joel I-J Wang, Simon Gustavsson, William D. Oliver
Superconducting qubits are leading candidates for building quantum computers capable of performing computations beyond the reach of current supercomputers. The superconducting qubit modality has been used to demonstrate prototype algorithms in the 'noisy intermediate-scale quantum' (NISQ) era, where non-error-corrected qubits are used to implement quantum simulations and algorithms. Recent advancements include multiple high-fidelity two-qubit gates and operations on logical qubits in extensible superconducting qubit systems, indicating potential for larger-scale error-corrected quantum computers. This review discusses recent experimental advances in qubit hardware, gate implementations, readout capabilities, early NISQ algorithm implementations, and quantum error correction using superconducting qubits. While significant progress has been made, continued work is necessary to fully realize the potential of superconducting qubits for quantum computing.Superconducting qubits are leading candidates for building quantum computers capable of performing computations beyond the reach of current supercomputers. The superconducting qubit modality has been used to demonstrate prototype algorithms in the 'noisy intermediate-scale quantum' (NISQ) era, where non-error-corrected qubits are used to implement quantum simulations and algorithms. Recent advancements include multiple high-fidelity two-qubit gates and operations on logical qubits in extensible superconducting qubit systems, indicating potential for larger-scale error-corrected quantum computers. This review discusses recent experimental advances in qubit hardware, gate implementations, readout capabilities, early NISQ algorithm implementations, and quantum error correction using superconducting qubits. While significant progress has been made, continued work is necessary to fully realize the potential of superconducting qubits for quantum computing.