Fast and Unconditional All-Microwave Reset of a Superconducting Qubit.
- Magnard P Department of Physics, ETH Zürich, CH-8093 Zürich, Switzerland.
- Kurpiers P Department of Physics, ETH Zürich, CH-8093 Zürich, Switzerland.
- Royer B Institut Quantique and Département de Physique, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada.
- Walter T Department of Physics, ETH Zürich, CH-8093 Zürich, Switzerland.
- Besse JC Department of Physics, ETH Zürich, CH-8093 Zürich, Switzerland.
- Gasparinetti S Department of Physics, ETH Zürich, CH-8093 Zürich, Switzerland.
- Pechal M Department of Physics, ETH Zürich, CH-8093 Zürich, Switzerland.
- Heinsoo J Department of Physics, ETH Zürich, CH-8093 Zürich, Switzerland.
- Storz S Department of Physics, ETH Zürich, CH-8093 Zürich, Switzerland.
- Blais A Institut Quantique and Département de Physique, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada.
- Wallraff A Department of Physics, ETH Zürich, CH-8093 Zürich, Switzerland.
- 2018-08-25
Published in:
- Physical review letters. - 2018
English
Active qubit reset is a key operation in many quantum algorithms, and particularly in quantum error correction. Here, we experimentally demonstrate a reset scheme for a three-level transmon artificial atom coupled to a large bandwidth resonator. The reset protocol uses a microwave-induced interaction between the |f,0⟩ and |g,1⟩ states of the coupled transmon-resonator system, with |g⟩ and |f⟩ denoting the ground and second excited states of the transmon, and |0⟩ and |1⟩ the photon Fock states of the resonator. We characterize the reset process and demonstrate reinitialization of the transmon-resonator system to its ground state in less than 500 ns and with 0.2% residual excitation. Our protocol is of practical interest as it has no additional architectural requirements beyond those needed for fast and efficient single-shot readout of transmons, and does not require feedback.
- Language
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- English
- Open access status
- hybrid
- Identifiers
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- DOI 10.1103/PhysRevLett.121.060502
- PMID 30141638
- Persistent URL
- https://sonar.ch/global/documents/266312
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