Minimizing quasiparticle generation from stray infrared light in superconducting quantum circuits

By R. Barends, J. Wenner, M. Lenander, Yu Chen, R. Bialczak, J. Kelly, E. Lucero, P. O’Malley, M. Mariantoni, D. Sank and 7 more. 2011

283 citations recorded by the source corpus.

We find that quasiparticle generation from stray infrared light creates a significant loss mechanism in superconducting resonators and qubits. We show that resonator quality factors and qubit energy relaxation times are limited by a quasiparticle density of approximately 200 μm−3, induced by 4 K blackbody radiation from the environment. We demonstrate how this influence can be fully removed by isolating the devices from the radiative environment using multistage shielding.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/65203e37314730b49d7f22dcd9e98655a4b97ded

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Materials challenges and opportunities for quantum computing hardware (2021, background): “Althoughthecauseofnon-equilibrium QPs is not known, potential mechanisms include stray infrared or optical photons, high-energy phonons, or cosmic rays ( 80 , 87 – 90 ).”
Electric field spectroscopy of material defects in transmon qubits (2019, unknown): “[22] Barends, R. et al. Coherent josephson qubit suitable for scalable quantum integrated circuits. Phys. Rev. Lett. 111, 080502 (2013). [23] Quintana, C.”
Circuit quantum electrodynamics (2020, background): “…systems within the materials and interfaces of the devices (Müller et al., 2019), quasiparticles (Glazman and Catelani, 2020) generated by a number of phenomenon including infrared radiation (Barends et al., 2011; Córcoles et al., 2011) and even ionizing radiation (Vepsäläinen et al., 2020).”