DARPA's HARQ program is basically the quantum version of classical computing's CPU-to-heterogeneous-chip evolution — stop forcing one qubit type to do processing, memory, AND communication, and instead let trapped ions, neutral atoms, and superconducting qubits each handle what they're best at. IonQ's diamond-based quantum memories are the play here because nitrogen-vacancy centers in synthetic diamond can interface with photonic channels over standard fiber optic infrastructure, which is how you actually network these things at datacenter scale without building bespoke hardware. The 1,000x resource reduction DARPA is projecting from heterogeneous compilers alone is ambitious but tracks — same efficiency gains classical computing saw when GPUs took over parallel workloads from general-purpose CPUs.

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