The paper defines covert quantum computing via quantum strategies, proves O(sqrt(n)) border qubits suffice for detection in planar n-qubit circuits with nearest-neighbor crosstalk, and experimentally detects additional long-range coupling on IQM Emerald and IBM Heron processors.
Achievability of Covert Quantum Communication,
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Toward Covert Quantum Computing
The paper defines covert quantum computing via quantum strategies, proves O(sqrt(n)) border qubits suffice for detection in planar n-qubit circuits with nearest-neighbor crosstalk, and experimentally detects additional long-range coupling on IQM Emerald and IBM Heron processors.