| Autor: |
Gebauer, Richard, Karcher, Nick, Gusenkova, Daria, Spiecker, Martin, Grünhaupt, Lukas, Takmakov, Ivan, Winkel, Patrick, Planat, Luca, Roch, Nicolas, Wernsdorfer, Wolfgang, Ustinov, Alexey V., Weber, Marc, Weides, Martin, Pop, Ioan M., Sander, Oliver |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2020, Vol. 2241 Issue 1, p020015-1-020015-5, 5p |
| Abstrakt: |
We developed a versatile integrated control and readout instrument for experiments with superconducting quantum bits (qubits), based on a field-programmable gate array (FPGA) platform. Using this platform, we perform measurement-based, closed-loop feedback operations with 428 ns platform latency. The feedback capability is instrumental in realizing active reset initialization of the qubit into the ground state in a time much shorter than its energy relaxation time T1. We show experimental results demonstrating reset of a fluxonium qubit with 99:4% fidelity, using a readout-and-drive pulse sequence approximately 1:5 μs long. Compared to passive ground state initialization through thermalization, with the time constant given by T1 = 80 μs, the use of the FPGA-based platform allows us to improve both the fidelity and the time of the qubit initialization by an order of magnitude. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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