Rohin Tangirala

Former Undergraduate Researcher, EECS · 2021-2023

Next: Graduate student at University of Washington

Group publications 1

↓ Download as BibTeX

Non-Markovian dynamics of a superconducting qubit in a phononic bandgap

M. Odeh, K. Godeneli, E. Li, R. Tangirala, H. Zhou, X. Zhang, Z.-H. Zhang, A. Sipahigil

Nature Physics 21, 406–411 (2025)

DOI arXiv News & Views
```
@article{odeh_non-markovian_2025,
  title = {Non-{Markovian} dynamics of a superconducting qubit in a phononic bandgap},
  volume = {21},
  url = {https://www.nature.com/articles/s41567-024-02740-5},
  doi = {10.1038/s41567-024-02740-5},
  journal = {Nature Physics},
  number = {3},
  pages = {406--411},
  issn = {1745-2473, 1745-2481},
  author = {Odeh, Mutasem and Godeneli, Kadircan and Li, Eric and Tangirala, Rohin and Zhou, Haoxin and Zhang, Xueyue and Zhang, Zi-Huai and Sipahigil, Alp},
  month = mar,
  year = {2025},
  arxiv = {2312.01031}
}
```
The overhead to construct a logical qubit from physical qubits rapidly increases with the decoherence rate. Current superconducting qubits reduce dissipation due to two-level systems (TLSs) by using large device footprints. However, this approach provides partial protection, and results in a trade-off between qubit footprint and dissipation. This work introduces a new platform using phononics to engineer superconducting qubit-TLS interactions. We realize a superconducting qubit on a phononic bandgap metamaterial that suppresses TLS-mediated phonon emission. We use the qubit to probe its thermalization dynamics with the phonon-engineered TLS bath. Inside the phononic bandgap, we observe the emergence of non-Markovian qubit dynamics due to the Purcell-engineered TLS lifetime of 34 μs. We discuss the implications of these observations for extending qubit relaxation times through simultaneous phonon protection and miniaturization.