Toward Systematic Architectural Design of Near-Term Trapped Ion Quantum Computers

Motional mode energy is the major contributor to heating error. The trend is explained in Section 7.1. Figure 6c–6e show the fidelity of six applications (higher is better). For BV, Adder, and QAOA, fidelity is high even at very low trap capacity because of their low communication requirements. For Supremacy, SquareRoot, and QFT, fidelity is low at small trap capacity ( 15 ions), attains a maximum thereafter and drops significantly when the trap capacity is 30 or more.