Losses in superconducting planar resonators are presently assumed to predominantly arise
from surface-oxide dissipation, due to experimental losses varying with choice of materials …

By analyzing the dissipative dynamics of a tunable gap flux qubit, we extract both sides of its
two-sided environmental flux noise spectral density over a range of frequencies around 2 k …

We report quantum coherence measurements of a superconducting qubit whose design is a
hybrid of several existing types. Excellent coherence times are found: T 2*∼ T 1∼ 1.5 μ s …

We introduce a frequency-multiplexed readout scheme for superconducting phase qubits.
Using a quantum circuit with four phase qubits, we couple each qubit to a separate lumped …

We study the system where a superconducting flux qubit is capacitively coupled to an LC
resonator. In three devices with different coupling capacitance, the magnitude of the …

We present experimental results on a microwave scheme for reading out a Josephson
phase qubit. A capacitively shunted superconducting quantum interference device (SQUID) …

We formulate a model for the steady state response of a nonlinear quantum oscillator
structure, such as those used in a variety of superconducting qubit experiments, when …

Quantum annealing can potentially be used to find better solutions to hard optimization
problems faster than purely classical hardware. To take full advantage of quantum effects …

We demonstrate a remote sensing design of phase qubits by separating the control and
readout circuits from the qubit loop. This design improves measurement reliability because …

We analyze a two-level quantum system, describing the phase qubit, during a single-pulse
readout process by a numerical solution of the time-dependent Schroedinger equation. It …