Characterize decoherence effects on analogue Bell-state preparation

Characterize the effect of environmental decoherence on the fidelity and performance of the analogue protocol for preparing the singlet Bell state in a transverse-field Ising device, including a more complete characterization of decoherence-related errors.

Background

The paper analyzes systematic control errors in the analogue protocol but does not model environmental noise, reasoning that superconducting-qubit coherence times are substantially longer than the approximately 100 ns preparation duration. Because the protocol targets high state-preparation fidelities, the authors identify a more complete study of decoherence effects as unresolved future work. This concerns quantifying how environmental noise affects both the adiabatic interpolation and resonant population-transfer stages, as well as the achievable singlet-state fidelity.

References

Nonetheless, since we are interested in studying high accuracies, its effect should be studied in a more complete characterisation, which we leave for future work.

— Preparation of a Bell state in an analogue device hosting the transverse-field Ising model  (2609.09013 - Palacios, 8 Sep 2026) in Section 4, “Robustness to non-idealities”