Trapped ions are among the most promising systems for practical quantum computing (QC).
The basic requirements for universal QC have all been demonstrated with ions, and …

Quantum computers can now run interesting programs, but each processor's capability—the
set of programs that it can run successfully—is limited by hardware errors. These errors can …

Quantum computers promise tremendous impact across applications—and have shown
great strides in hardware engineering—but remain notoriously error prone. Careful design of …

Various quantum applications can be reduced to estimating expectation values, which are
inevitably deviated by operational and environmental errors. Although errors can be tackled …

Excitement about the promise of quantum computers is tempered by the reality that the
hardware remains exceptionally fragile and error prone, forming a bottleneck in the …

PyGSTi is a Python software package for assessing and characterizing the performance of
quantum computing processors. It can be used as a standalone application, or as a library …

Errors in quantum logic gates are usually modeled by quantum process matrices (CPTP
maps). But process matrices can be opaque and unwieldy. We show how to transform the …

Non-Markovian noise presents a particularly relevant challenge in understanding and
combating decoherence in quantum computers, yet is challenging to capture in terms of …

We describe an experimental effort designing and deploying error-robust single-qubit
operations using a cloud-based quantum computer and analog-layer programming access …

From an open system perspective non-Markovian effects due to a nearby bath or
neighboring qubits are dynamically equivalent. However, there is a conceptual distinction to …