Large-scale superconducting quantum computers require the high-fidelity control and
readout of large numbers of qubits at millikelvin temperatures, resulting in a massive input …

Currently available quantum processors are dominated by noise, which severely limits their
applicability and motivates the search for new physical qubit encodings. In this work, we …

Optimal control of qubits requires the ability to adapt continuously to their ever-changing
environment. We demonstrate a real-time control protocol for a two-electron singlet-triplet …

Addressing and mitigating decoherence sources plays an essential role in the development
of a scalable quantum computing system, which requires low gate errors to be consistently …

Environmental fluctuations degrade the performance of solid-state qubits but can in principle
be mitigated by real-time Hamiltonian estimation down to timescales set by the estimation …

In planar superconducting circuits, decoherence due to materials imperfections, especially
two-level-system (TLS) defects at different interfaces, is a primary hurdle for advancing …

Qudits provide a resource-efficient alternative to qubits for quantum information processing.
The multilevel nature of the transmon, with its individually resolvable transition frequencies …

Phase slips occur across all Josephson junctions (JJs) at a rate that increases with the
impedance of the junction. In superconducting qubits composed of JJ-array superinductors …

Recently, several groups have demonstrated two-qubit gate fidelities in semiconductor spin
qubit systems above 99%. Achieving this regime of fault-tolerant compatible high fidelities is …

Towards the practical use of quantum computers in the NISQ era, as well as the realization
of fault-tolerant quantum computers that utilize quantum error correction codes, pressing …