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Irfan Siddiqi
Researcher at Lawrence Berkeley National Laboratory
Publications - 184
Citations - 9766
Irfan Siddiqi is an academic researcher from Lawrence Berkeley National Laboratory. The author has contributed to research in topics: Qubit & Josephson effect. The author has an hindex of 43, co-authored 157 publications receiving 7634 citations. Previous affiliations of Irfan Siddiqi include Yale University & University of California, Berkeley.
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A near–quantum-limited Josephson traveling-wave parametric amplifier
C. Macklin,C. Macklin,Kevin O'Brien,David Hover,Mollie Schwartz,Vladimir Bolkhovsky,Xiang Zhang,Xiang Zhang,Xiang Zhang,William D. Oliver,Irfan Siddiqi +10 more
TL;DR: A superconducting amplifier based on a Josephson junction transmission line that exhibited high gain over a gigahertz-sized bandwidth and was able to perform high-fidelity qubit readout and has broad applicability to microwave metrology and quantum optics.
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Stabilizing Rabi oscillations in a superconducting qubit using quantum feedback
R. Vijay,C. Macklin,Daniel H. Slichter,Daniel H. Slichter,S. J. Weber,Kater Murch,Ravi Naik,Alexander N. Korotkov,Irfan Siddiqi +8 more
TL;DR: In this paper, a superconducting quantum bit (qubit) coupled to a microwave cavity is used to stabilize the oscillation phase of a driven quantum bit, which can be used to continuously track and steer the quantum state using feedback.
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Observing single quantum trajectories of a superconducting quantum bit
TL;DR: It is demonstrated that decoherence can be mitigated by environmental monitoring, and the foundation of quantum feedback approaches based on Bayesian statistics is validated, suggesting a new means of implementing 'quantum steering’—the harnessing of action at a distance to manipulate quantum states through measurement.
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Observation of quantum jumps in a superconducting artificial atom.
TL;DR: This work continuously measure the state of a superconducting quantum bit coupled to a microwave readout cavity by using a fast, ultralow-noise parametric amplifier to enable quantum error correction and feedback--essential components of quantum information processing.
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RF-driven Josephson bifurcation amplifier for quantum measurement.
Irfan Siddiqi,R. Vijay,F. Pierre,Christopher Wilson,M. Metcalfe,Chad Rigetti,Luigi Frunzio,Michel Devoret +7 more
TL;DR: Pulsed microwave reflection measurements on nanofabricated Al junctions show that actual devices attain the performance predicted by theory, and the absence of on-chip dissipation is shown.