591 citations · 2.8k across the 13 of their papers we have counts for
13 papers
Determining the vibrations between sensor and sample in SQUID microscopy
Daniel Schiessl, John R. Kirtley, Lisa Paulius +8
Vibrations can cause noise in scanning probe microscopies. Relative vibrations between the scanning sensor and the sample are important but can be more difficult to determine than…
The response of small SQUID pickup loops to magnetic fields
John R. Kirtley, Lisa Paulius, Aaron J. Rosenberg +11
In the past, magnetic images acquired using scanning Superconducting Quantum Interference Device (SQUID) microscopy have been interpreted using simple models for the sensor point s…
Scanning SQUID susceptometers with sub-micron spatial resolution
John R. Kirtley, Lisa Paulius, Aaron J. Rosenberg +12
Superconducting QUantum Interference Device (SQUID) microscopy has excellent magnetic field sensitivity, but suffers from modest spatial resolution when compared with other scannin…
Characterization of addressability by simultaneous randomized benchmarking
Jay M. Gambetta, A. D. Corcoles, S. T. Merkel +9
The control and handling of errors arising from cross-talk and unwanted interactions in multi-qubit systems is an important issue in quantum information processing architectures. W…
Efficient measurement of quantum gate error by interleaved randomized benchmarking
Easwar Magesan, Jay M. Gambetta, B. R. Johnson +9
We describe a scalable experimental protocol for obtaining estimates of the error rate of individual quantum computational gates. This protocol, in which random Clifford gates are…
Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
Chad Rigetti, Stefano Poletto, Jay M. Gambetta +10
We report a superconducting artificial atom with an observed quantum coherence time of T2*=95us and energy relaxation time T1=70us. The system consists of a single Josephson juncti…
Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits
Jerry M. Chow, Jay M. Gambetta, A. D. Corcoles +9
We use quantum process tomography to characterize a full universal set of all-microwave gates on two superconducting single-frequency single-junction transmon qubits. All extracted…
Protecting superconducting qubits from external sources of loss and heat
Antonio D. Córcoles, Jerry M. Chow, Jay M. Gambetta +6
We characterize a superconducting qubit before and after embedding it along with its package in an absorptive medium. We observe a drastic improvement in the effective qubit temper…
A simple all-microwave entangling gate for fixed-frequency superconducting qubits
Jerry M. Chow, A. D. Corcoles, Jay M. Gambetta +8
We demonstrate an all-microwave two-qubit gate on superconducting qubits which are fixed in frequency at optimal bias points. The gate requires no additional subcircuitry and is tu…
High coherence hybrid superconducting qubit
Matthias Steffen, Shwetank Kumar, David P. DiVincenzo +4
We measure the coherence of a new superconducting qubit, the {\em low-impedance flux qubit}, finding s. It is a three-junction flux qubit, but the ratio o…
Readout for Phase Qubits without Josephson Junctions
Matthias Steffen, Shwetank Kumar, David DiVincenzo +4
We present a novel readout scheme for phase qubits which eliminates the read-out SQUID so that the entire qubit and measurement circuitry only requires a single Josephson junction.…
Integer and half-integer flux-quantum transitions in a niobium/iron-pnictide loop
C. -T. Chen, C. C. Tsuei, M. B. Ketchen +2
The recent discovery of iron-based superconductors challenges the existing paradigm of high-temperature superconductivity. Owing to their unusual multi-orbital band structure, magn…
Decoherence of floating qubits due to capacitive coupling
Matthias Steffen, Frederico Brito, David DiVincenzo +2
It has often been assumed that electrically floating qubits, such as flux qubits, are immune to decoherence due to capacitive coupling. We show that capacitive coupling to bias lea…