Bulk and surface loss in superconducting transmon qubits
| Autor: | Oliver Dial, Matthias Steffen, Jay M. Gambetta, Stefano Poletto, David W. Abraham, Douglas McClure, Mary Beth Rothwell, Jerry M. Chow, G. A. Keefe |
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| Rok vydání: | 2015 |
| Předmět: |
Quantum decoherence
Substrate surface FOS: Physical sciences 02 engineering and technology 01 natural sciences 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Materials Chemistry Wafer Electrical and Electronic Engineering 010306 general physics Superconductivity Physics Quantum Physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Metals and Alloys Transmon 021001 nanoscience & nanotechnology Condensed Matter Physics Surface loss Qubit Ceramics and Composites Sapphire 0210 nano-technology Quantum Physics (quant-ph) |
| DOI: | 10.48550/arxiv.1509.03859 |
| Popis: | Decoherence of superconducting transmon qubits is purported to be consistent with surface loss from two-level systems on the substrate surface. Here, we present a study of surface loss in transmon devices, explicitly designed to have varying sensitivities to different surface loss contributors. Our experiments also encompass two particular different sapphire substrates, which reveal the onset of a yet unknown additional loss mechanism outside of surface loss for one of the substrates. Tests across different wafers and devices demonstrate substantial variation, and we emphasize the importance of testing large numbers of devices for disentangling different sources of decoherence. Comment: 4 pages, 3 figures |
| Databáze: | OpenAIRE |
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