A donor-cluster array architecture in silicon uses shared electrons and natural hyperfine distributions for individual spin addressability, tunable inter-cluster exchange, and high-fidelity gates to enable scalable quantum computing.
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Spin Kerr-cat qubits encode information in the lowest levels of a Z2-symmetric nuclear-spin Hamiltonian in quadrupolar nuclei to achieve first-order dephasing suppression, yielding estimated T2* of 100 s for 123Sb in silicon and 99% two-qubit gate fidelity with quadrupolar enhancement.
Intermediate tunnel couplings in donor flip-flop qubits enable simultaneous strong spin-photon coupling and high-fidelity readout.
citing papers explorer
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Scalable Spin Qubit Architecture with Donor-Cluster Arrays in Silicon
A donor-cluster array architecture in silicon uses shared electrons and natural hyperfine distributions for individual spin addressability, tunable inter-cluster exchange, and high-fidelity gates to enable scalable quantum computing.
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Spin Kerr-cat qubits
Spin Kerr-cat qubits encode information in the lowest levels of a Z2-symmetric nuclear-spin Hamiltonian in quadrupolar nuclei to achieve first-order dephasing suppression, yielding estimated T2* of 100 s for 123Sb in silicon and 99% two-qubit gate fidelity with quadrupolar enhancement.
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Simultaneous High-Fidelity Readout and Strong Coupling for a Donor-Based Spin Qubit
Intermediate tunnel couplings in donor flip-flop qubits enable simultaneous strong spin-photon coupling and high-fidelity readout.