Superconducting Qubits: Current State of Play
Review article, 2020

Superconducting qubits are leading candidates in the race to build a quantum computer capable of realizing computations beyond the reach of modern supercomputers. The superconducting qubit modality has been used to demonstrate prototype algorithms in the noisy intermediate-scale quantum (NISQ) technology era, in which non-error-corrected qubits are used to implement quantum simulations and quantum algorithms. With the recent demonstrations of multiple high-fidelity, two-qubit gates as well as operations on logical qubits in extensible superconducting qubit systems, this modality also holds promise for the longer-term goal of building larger-scale error-corrected quantum computers. In this brief review, we discuss several of the recent experimental advances in qubit hardware, gate implementations, readout capabilities, early NISQ algorithm implementations, and quantum error correction using superconducting qubits. Although continued work on many aspects of this technology is certainly necessary, the pace of both conceptual and technical progress in recent years has been impressive, and here we hope to convey the excitement stemming from this progress.

Quantum algorithms

Quantum simulation

NISQ era

Superconducting circuits

Quantum computing

Quantum error correction


M. Kjaergaard

Massachusetts Institute of Technology (MIT)

Mollie E. Schwartz

MIT Lincoln Laboratory

Jochen Braumüller

Massachusetts Institute of Technology (MIT)

Philip Krantz

Chalmers, Microtechnology and Nanoscience (MC2)

Joel I.J. Wang

Massachusetts Institute of Technology (MIT)

S. Gustavsson

Massachusetts Institute of Technology (MIT)

William D. Oliver

Massachusetts Institute of Technology (MIT)

MIT Lincoln Laboratory

Annual Review of Condensed Matter Physics

1947-5454 (ISSN) 1947-5462 (eISSN)

Vol. 11 369-395

Subject Categories

Computer Engineering

Theoretical Chemistry

Computer Science



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