The future development of quantum information using superconducting circuits requires
Josephson qubits with long coherence times combined with a high-fidelity readout …

We demonstrate initialization by joint measurement of two transmon qubits in 3D circuit
quantum electrodynamics. Homodyne detection of cavity transmission is enhanced by …

We demonstrate a qubit readout scheme that exploits the Jaynes-Cummings nonlinearity of
a superconducting cavity coupled to transmon qubits. We find that, in the strongly driven …

Significant advances in coherence render superconducting quantum circuits a viable
platform for fault-tolerant quantum computing. To further extend capabilities, highly coherent …

Following the demonstration of coherent control of the quantum state of a superconducting
charge qubit, a variety of qubits based on Josephson junctions have been implemented …

Superconducting quantum circuits based on Josephson junctions have made rapid progress
in demonstrating quantum behavior and scalability. However, the future prospects ultimately …

We propose and demonstrate a read-out technique for a superconducting qubit by
dispersively coupling it with a Josephson parametric oscillator. We employ a tunable quarter …

The ability to perform fast, high-fidelity readout of quantum bits (qubits) is essential to the
goal of building a quantum computer. However, coupling a fast measurement channel to a …

The speed of quantum gates and measurements is a decisive factor for the overall fidelity of
quantum protocols when performed on physical qubits with a finite coherence time …

Quantum computers have the potential to solve problems which are classically intractable.
Superconducting qubits present a promising path to building such a computer. Recent …