A family of spin chains (T-Rex) achieves asymptotically optimal trade-offs between transfer time and arrival-width sensitivity, replacing the tight sin^{2(N-1)} arrival peaks with sin^6 or sin^8 profiles.
Kirkland, Sensitivity analysis of perfect state transfer in quantum spin networks, Linear Algebra Appl
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Optimising Perfect Quantum State Transfer for Timing Insensitivity
A family of spin chains (T-Rex) achieves asymptotically optimal trade-offs between transfer time and arrival-width sensitivity, replacing the tight sin^{2(N-1)} arrival peaks with sin^6 or sin^8 profiles.