Many important phenomena in quantum devices are dynamic, meaning that they cannot be
studied using time-averaged measurements alone. Experiments that measure such transient …

We demonstrate the use of radio-frequency (rf) resonators to measure the capacitance of
nanoscale semiconducting devices in field-effect transistor configurations. The rf resonator is …

We demonstrate a radio-frequency parametric amplifier that exploits the gate-tunable
quantum capacitance of an ultra high mobility two dimensional electron gas (2DEG) in a …

Quantum point contacts (QPC) are the building blocks of quantum dot qubits and
semiconducting quantum electrical metrology circuits. QPCs also make highly sensitive …

Quantum point contacts with a short (100-nm) channel in a high-mobility two-dimensional
electron gas of GaAs/Al (Ga) As heterostructures and a short-channel p-type field-effect …

Finite gate errors limit performance of modern quantum computers. In this work, we study
single qubit gate fidelities for trapped ions. For this we have numerically solved Schrödinger …