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PreprintCC BY 4.0arXiv

Dynamics of Majorana tetron qubits under quasiparticle poisoning

  • Sauri Bhattacharyya
  • Bernard van Heck
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Abstract

We study the dissipative dynamics of a Majorana tetron qubit in the presence of extrinsic quasiparticle poisoning due to the coupling to external leads. From the Bloch-Redfield equation describing a finite-size topological superconductor hosting four Majorana zero modes and tunnel-coupled to fermionic reservoirs, we recover analytical expressions for the decoherence rate of a Majorana qubit at arbitrary values of the charging energy. The analysis shows that the exponential suppression of the decoherence rate is gradually removed by the energy splitting of the qubit states. These results can be useful to understand time-domain experimental data in Majorana qubit prototypes.

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Cite

BibTeXRIS
BibTeX
@misc{bhattacharyya2026dynamics,
  title = {{Dynamics of Majorana tetron qubits under quasiparticle poisoning}},
  author = {Sauri Bhattacharyya and Bernard van Heck},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.18042},
  eprint = {2608.18042},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.18042},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Dynamics of Majorana tetron qubits under quasiparticle poisoning
AU  - Sauri Bhattacharyya
AU  - Bernard van Heck
PY  - 2026
DA  - 2026/08/30
PB  - arXiv
DO  - 10.48550/arxiv.2608.18042
UR  - https://arxiv.org/abs/2608.18042
AB  - We study the dissipative dynamics of a Majorana tetron qubit in the presence of extrinsic quasiparticle poisoning due to the coupling to external leads. From the Bloch-Redfield equation describing a finite-size topological superconductor hosting four Majorana zero modes and tunnel-coupled to fermionic reservoirs, we recover analytical expressions for the decoherence rate of a Majorana qubit at arbitrary values of the charging energy. The analysis shows that the exponential suppression of the decoherence rate is gradually removed by the energy splitting of the qubit states. These results can be useful to understand time-domain experimental data in Majorana qubit prototypes.
ER  -