1. Thermal circuit model for silicon quantum-dot array structures
- Author
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Utsugi, Takeru, Kusuno, Nobuhiro, Kuno, Takuma, Lee, Noriyuki, Yanagi, Itaru, Mine, Toshiyuki, Saito, Shinichi, Hisamoto, Digh, Tsuchiya, Ryuta, and Mizuno, Hiroyuki
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics ,Physics - Applied Physics - Abstract
Temperature rise of qubits due to heating is a critical issue in large-scale quantum computers based on quantum-dot (QD) arrays. This leads to shorter coherence times, induced readout errors, and increased charge noise. Here, we propose a simple thermal circuit model to describe the heating effect on silicon QD array structures. Noting that the QD array is a periodic structure, we represent it as a thermal distributed-element circuit, forming a thermal transmission line. We validate this model by measuring the electron temperature in a QD array device using Coulomb blockade thermometry, finding that the model effectively reproduces experimental results. This simple and scalable model can be used to develop the thermal design of large-scale silicon-based quantum computers., Comment: 8 pages, 7 figures
- Published
- 2024