595 citations · 2.7k across the 23 of their papers we have counts for
23 papers
Suppressing relaxation in superconducting qubits by quasiparticle pumping
Simon Gustavsson, Fei Yan, Gianluigi Catelani +15
Dynamical error suppression techniques are commonly used to improve coherence in quantum systems. They reduce dephasing errors by applying control pulses designed to reverse errone…
The Flux Qubit Revisited to Enhance Coherence and Reproducibility
F. Yan, S. Gustavsson, A. Kamal +11
The scalable application of quantum information science will stand on reproducible and controllable high-coherence quantum bits (qubits). Here, we revisit the design and fabricatio…
Asymmetric frequency conversion in nonlinear systems driven by a biharmonic pump
Archana Kamal, Ananda Roy, John Clarke +1
A novel mechanism of asymmetric frequency conversion is investigated in nonlinear dispersive devices driven parametrically with a biharmonic pump. When the relative phase between t…
Flux noise in 2D Heisenberg spin glasses: effects of weak anisotropic interactions
Juan Atalaya, John Clarke, Gerd Schön +1
We study the dynamics of a two-dimensional ensemble of randomly distributed classical Heisenberg spins with isotropic RKKY and weaker anisotropic dipole-dipole couplings. Such ense…
Gain, directionality and noise in microwave SQUID amplifiers: Input-output approach
Archana Kamal, John Clarke, Michel Devoret
We present a new theoretical framework to analyze microwave amplifiers based on the dc SQUID. Our analysis applies input-output theory generalized for Josephson junction devices bi…
Heralded state preparation in a superconducting qubit
J. E. Johnson, C. Macklin, D. H. Slichter +4
We demonstrate high-fidelity, quantum nondemolition, single-shot readout of a superconducting flux qubit in which the pointer state distributions can be resolved to below one part…