Multi-level quantum noise spectroscopy
| Autor: | Fei Yan, Jochen Braumüller, Alexander Melville, Youngkyu Sung, Roni Winik, Morten Kjaergaard, Philip Krantz, Bethany Niedzielski, Terry P. Orlando, William D. Oliver, Jonilyn Yoder, Simon Gustavsson, Antti Vepsäläinen, David Kim, Joel I-Jan Wang, Mollie Schwartz, Andreas Bengtsson |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Quantum information
Computer science Science General Physics and Astronomy FOS: Physical sciences 02 engineering and technology Quantum metrology 01 natural sciences General Biochemistry Genetics and Molecular Biology Article Computer Science::Emerging Technologies 0103 physical sciences Quantum system Statistical physics Hardware_ARITHMETICANDLOGICSTRUCTURES 010306 general physics Quantum Quantum Physics Multidisciplinary Quantum noise General Chemistry 021001 nanoscience & nanotechnology Noise Qubit 0210 nano-technology Quantum Physics (quant-ph) Qubits Coherence (physics) |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021) Nature Communications Sung, Y, Vepsalainen, A, Braumuller, J, Yan, F, Wang, J I-J, Kjaergaard, M, Winik, R, Krantz, P, Bengtsson, A, Melville, A J, Niedzielski, B M, Schwartz, M E, Kim, D K, Yoder, J L, Orlando, T P, Gustavsson, S & Oliver, W D 2021, ' Multi-level quantum noise spectroscopy ', Nature Communications, vol. 12, no. 1, 967 . https://doi.org/10.1038/s41467-021-21098-3 |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/s41467-021-21098-3 |
| Popis: | System noise identification is crucial to the engineering of robust quantum systems. Although existing quantum noise spectroscopy (QNS) protocols measure an aggregate amount of noise affecting a quantum system, they generally cannot distinguish between the underlying processes that contribute to it. Here, we propose and experimentally validate a spin-locking-based QNS protocol that exploits the multi-level energy structure of a superconducting qubit to achieve two notable advances. First, our protocol extends the spectral range of weakly anharmonic qubit spectrometers beyond the present limitations set by their lack of strong anharmonicity. Second, the additional information gained from probing the higher-excited levels enables us to identify and distinguish contributions from different underlying noise mechanisms. Comment: 23 pages, 9 figures |
| Databáze: | OpenAIRE |
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