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Observation of Discrete Charge States of a Coherent Two-Level System in a Superconducting Qubit
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RF mixing modules for superconducting qubit room temperature control systems v1.0
We have developed a series of compact RF mixing boards by integrating I/Q quadrature mixing, IF(intermediate frequency)/LO(local oscillator)/RF power level adjustments, and DC (direct current) bias fine tuning on a 40 mm × 80 mm 4-layer PCB (printed circuit board) board with EMI (electromagnetic interference) shielding.
Fundamental understanding of magnetic vortex dynamics on superconducting qubits for quantum computing
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Analysis of Microscopic Defects in Nb thin films for superconducting qubits and SRF cavities
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Interfacial Width Analysis of Metal Capping Layers and Niobium in Superconducting Qubits
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Algorithm driven fault tolerant architectures based on superconducting qubits
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Wavelike Dark Matter Searches with SRF Cavities and Superconducting Qubits at SQMS
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Fast ZZ-Free Entangling Gates for Superconducting Qubits Assisted by a Driven Resonator
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SERAPH: Wavelike Dark Matter Searches with SRF Cavities and Superconducting Qubits at SQMS
Talk about the SERAPH experiment to look for axions and dark photons.
Decoherence Noise on the Superconducting Qubits Training Program
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Superconducting Qubits as Quantum Sensors for the Detection of Ionizing Radiation
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Experimental Investigation of Superconducting Qubits as Quantum Sensors for the Detection of Ionizing Radiation
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SRF cavities and Superconducting qubits for Gravitational Waves and Dark Photons detection
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Superconducting Qubits as Quantum Sensors for the Detection of Ionizing Radiation
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Kinetics of Quasiparticle Tunneling in a Pair of Superconducting Qubits
The slide presentation reviews quasiparticle experiment. It includes information on the experiement set-up, tunneling, dwell time,kinetic theory, and temperature dependence.
Dynamical Decoupling of Crosstalk on Superconducting Qubit Devices
Current NISQ devices are prone to errors. In order to be used for practical applications or achieve fault-tolerant thresholds, strategies to suppress error rates will be needed to maximize the potential of noisy devices. Dynamical decoupling (DD) is one such strategy for suppressing — or at least alleviating — the effects of decoherence, in which sequences of pulses are applied to qubits to decouple their interaction with the environment. Through experimental runs performed on several Rigetti quantum computing units (QPUs), we first demonstrate that DD is capable of improving coherence times for isolated qubits, as well as suppressing errors caused by the ZZ coupling between pairs of qubits. Extending this framework to cycles containing2-qubit gates, we show that DD can be inserted to decouple qubits from crosstalk occurring during neighboring 2-qubit gates, and demonstrate the efficacy of this procedure on quantum approximate optimization algorithm (QAOA) circuits. We also explore the usage of tailored DD sequences for the suppression of characterized error channels. We are grateful for support from the NASA Ames Research Center and from the DARPA ONISQ program under interagency agreement IAA 8839,Annex 114. HYH is supported by the USRA Feynman QuantumAcademy funded by the NAMS R&D Student Program and a UCHellman Fellowship. JS, ZGI and ZW are supported by USRA NASAAcademic Mission Service (NNA16BD14C).