1.7k citations · 14.8k across the 60 of their papers we have counts for
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Dielectric surface loss in superconducting resonators with flux-trapping holes
B. Chiaro, A. Megrant, A. Dunsworth +18
Surface distributions of two level system (TLS) defects and magnetic vortices are limiting dissipation sources in superconducting quantum circuits. Arrays of flux-trapping holes ar…
Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching
T. C. White, J. Y. Mutus, I. -C. Hoi +18
Josephson parametric amplifiers have become a critical tool in superconducting device physics due to their high gain and quantum-limited noise. Traveling wave parametric amplifiers…
Simulating weak localization using superconducting quantum circuits
Yu Chen, P. Roushan, D. Sank +15
Understanding complex quantum matter presents a central challenge in condensed matter physics. The difficulty lies in the exponential scaling of the Hilbert space with the system s…
Qubit architecture with high coherence and fast tunable coupling
Yu Chen, C. Neill, P. Roushan +20
We introduce a superconducting qubit architecture that combines high-coherence qubits and tunable qubit-qubit coupling. With the ability to set the coupling to zero, we demonstrate…
Strong environmental coupling in a Josephson parametric amplifier
Josh Mutus, Ted White, Rami Barends +16
We present a lumped-element Josephson parametric amplifier designed to operate with strong coupling to the environment. In this regime, we observe broadband frequency dependent amp…
Design and characterization of a lumped element single-ended superconducting microwave parametric amplifier with on-chip flux bias line
Josh Mutus, Ted White, Evan Jeffrey +18
We demonstrate a lumped-element Josephson parametric amplifier, using a single-ended design that includes an on-chip, high-bandwidth flux bias line. The amplifier can be pumped int…
Multiplexed dispersive readout of superconducting phase qubits
Yu Chen, D. Sank, P. O'Malley +13
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-elem…
Excitation of superconducting qubits from hot non-equilibrium quasiparticles
J. Wenner, Yi Yin, Erik Lucero +15
Superconducting qubits probe environmental defects such as non-equilibrium quasiparticles, an important source of decoherence. We show that "hot" non-equilibrium quasiparticles, wi…
Controlled catch and release of microwave photon states
Yi Yin, Yu Chen, Daniel Sank +13
The quantum behavior of superconducting qubits coupled to resonators is very similar to that of atoms in optical cavities [1, 2], in which the resonant cavity confines photons and…
Dynamic quantum Kerr effect in circuit quantum electrodynamics
Yi Yin, H. Wang, M. Mariantoni +14
A superconducting qubit coupled to a microwave resonator provides a controllable system that enables fundamental studies of light-matter interactions. In the dispersive regime, pho…
Phase qubits fabricated with trilayer junctions
M. Weides, R. C. Bialczak, M. Lenander +11
We have developed a novel Josephson junction geometry with minimal volume of lossy isolation dielectric, being suitable for higher quality trilayer junctions implemented in qubits.…
Energy decay and frequency shift of a superconducting qubit from non-equilibrium quasiparticles
M. Lenander, H. Wang, Radoslaw C. Bialczak +12
Quasiparticles are an important decoherence mechanism in superconducting qubits, and can be described with a complex admittance that is a generalization of the Mattis-Bardeen theor…
Wirebond crosstalk and cavity modes in large chip mounts for superconducting qubits
J. Wenner, M. Neeley, Radoslaw C. Bialczak +8
We analyze the performance of a microwave chip mount that uses wirebonds to connect the chip and mount grounds. A simple impedance ladder model predicts that transmission crosstalk…
Generation of Three-Qubit Entangled States using Superconducting Phase Qubits
M. Neeley, R. C. Bialczak, M. Lenander +11
Entanglement is one of the key resources required for quantum computation, so experimentally creating and measuring entangled states is of crucial importance in the various physica…