In the past 20 years, impressive progress has been made both experimentally and
theoretically in superconducting quantum circuits, which provide a platform for manipulating …

Quantum information processing relies on the precise control of non-classical states in the
presence of many uncontrolled environmental degrees of freedom. The interactions …

Photonic cat states stored in high-Q resonators show great promise for hardware efficient
universal quantum computing. We propose an approach to efficiently prepare such cat …

Efficient approaches to quantum control and feedback are essential for quantum
technologies, from sensing to quantum computation. Open-loop control tasks have been …

Fault-tolerant quantum computing relies on the ability to detect and correct errors, which in
quantum error correction codes is typically achieved by projectively measuring multi-qubit …

We present a gradient-based optimal-control technique for open quantum systems that
utilizes quantum trajectories to simulate the quantum dynamics during optimization. Using …

State-of-the-art noisy digital quantum computers can only execute short-depth quantum
circuits. Variational algorithms are a promising route to unlock the potential of noisy quantum …

We consider superconducting circuits for the purpose of simulating the spin-boson model.
The spin-boson model consists of a single two-level system coupled to bosonic modes. In …

We employ quantum optimal control theory to realize quantum gates for two protected
superconducting circuits: the heavy-fluxonium qubit and the 0-π qubit. Utilizing automatic …

Kitaev's 0–π qubit encodes quantum information in two protected, near-degenerate states of
a superconducting quantum circuit. In a recent work, we have shown that the coherence …