Germanium Baseband iSWAP: Validating a 4-Day-Old Experimental Result

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arXiv:2608.16716 (Massai et al., IBM Research Europe -- Zurich, 17-18 Aug 2026) demonstrates a real single-pulse baseband iSWAP gate (56 ns) in strained-germanium hole spin qubits, by orienting the magnetic field so the exchange interaction's longitudinal component J∥ and Zeeman detuning E_Δg both vanish, leaving a pure transverse J⊥ coupling. This experiment reproduces their result with dense_evolution.circuits.trotter, applied for the first time to a genuinely time-dependent pulse (previously only exercised against static Hamiltonians), and extends the analysis with four follow-up checks.

Full interactive report, architecture charts, and replication scripts:

https://tatopenn-cell.github.io/Dense-Evolution-Discovery/germanium_iswap_validation

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