The DOI matches its Crossref record; 214 of the 214 references it cites were found in a registry or an index.
Towards understanding two-level-systems in amorphous solids: insights from quantum circuits
Open accessAbstract
Amorphous solids show surprisingly universal behaviour at low temperatures. The prevailing wisdom is that this can be explained by the existence of two-state defects within the material. The so-called standard tunneling model has become the established framework to explain these results, yet it still leaves the central question essentially unanswered—what are these two-level defects (TLS)? This question has recently taken on a new urgency with the rise of superconducting circuits in quantum computing, circuit quantum electrodynamics, magnetometry, electrometry and metrology. Superconducting circuits made from aluminium or niobium are fundamentally limited by losses due to TLS within the amorphous oxide layers encasing them. On the other hand, these circuits also provide a novel and effective method for studying the very defects which limit their operation. We can now go beyond ensemble measurements and probe individual defects—observing the quantum nature of their dynamics and studying their formation, their behaviour as a function of applied field, strain, temperature and other properties. This article reviews the plethora of recent experimental results in this area and discusses the various theoretical models which have been used to describe the observations. In doing so, it summarises the current approaches to solving this fundamentally important problem in solid-state physics.
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Cites
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Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 milliseconds
Wang, C., Li, X., Xu, H., Li, Z., Wang, J., Yang, Z., Mi, Z., Liang, X., Su, T., Yang, C., et al. (2022) · npj Quantum Information · doi:10.1038/s41534-021-00510-2 · Cited by 377
Engineering high-coherence superconducting qubits
Siddiqi, I. (2021) · Nature Reviews Materials · doi:10.1038/s41578-021-00370-4 · Cited by 311
Correlating Decoherence in Transmon Qubits: Low Frequency Noise by Single Fluctuators
Schlör, S., Lisenfeld, J., Müller, C., Bilmes, A., Schneider, A., Pappas, D. P., Ustinov, A. V., & Weides, M. (2019) · Physical Review Letters · doi:10.1103/physrevlett.123.190502 · Cited by 209
Self-citationMcKenna, T. P., Witmer, J. D., Patel, R. N., Jiang, W., Van Laer, R., Arrangoiz-Arriola, P., Wollack, E. A., Herrmann, J. F., & Safavi-Naeini, A. H. (2020) · Optica · doi:10.1364/optica.397235 · Cited by 130
Dynamics of superconducting qubit relaxation times
Carroll, M., Rosenblatt, S., Jurcevic, P., Lauer, I., & Kandala, A. (2022) · npj Quantum Information · doi:10.1038/s41534-022-00643-y · Cited by 136
Metadata
- Authors
- Müller, C., Cole, J. H., & Lisenfeld, J.
- Venue
- Reports on Progress in Physics
- Publisher
- IOP Publishing
- Published
- 2019-10-30
- Volume
- 82
- Issue
- 12
- Pages
- 124501
- ISSN
- 0034-4885 (ISSN-L)
- 1361-6633
- OpenAlex
- W2611050590
- Cited by
- 508
- References
- 214
- FWCI
- 16.35
- Type
- journal article
- Language
- en
- Open access
- bronze
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