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Simon Pettersson Fors

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Fast, unconditional reset and leakage reduction in fixed-frequency transmon qubits

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By Liangyu Chen, Tahereh Abad, Tangyou Huang, Amr Osman, Benjamin Lienhard, Sandoko Kosen, Hang-Xi Li, Daryoush Shiri, tong liu, Robert Rehammar, Mamta Dahiya, Marcus Rommel, Anita Fadavi Roudsari, Marco Caputo, Leif Grönberg, Joonas Govenius, Anton Frisk Kockum, Jonas Bylander, Giovanna Tancredi, Simon Pettersson Fors, Zixian Yan, Anaida Ali, Eleftherios Moschandreou, Abdullah-Al Amin, Andreas Nylander, Miroslav Dobsicek, Michele Faucci Giannelli
| Nature Verified
Abstract On-demand qubit-state initialization is a prerequisite for quantum computation. We demonstrate such a protocol in a device consisting of fixed-frequency transmon qubits pair-wise coupled via tunable couplers — an architecture that is also compatible with the surface code. We use tunable couplers to transfer any undesired qubit excitation to the readout resonator of the qubit, from which this excitation decays into the feedline.
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