Stroboscopic small-Big-small sequences with an auxiliary qubit stabilize cat and squeezed-cat manifolds, preserve bit-flip bias, and partially correct single-photon loss without reservoir engineering.
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Saturation of bit-flip suppression in cat qubits originates from chaotic dynamics in memory-buffer interactions when adiabatic approximation breaks and cross-Kerr plus dephasing are present.
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.
citing papers explorer
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Stroboscopic Stabilization of Cat Qubits
Stroboscopic small-Big-small sequences with an auxiliary qubit stabilize cat and squeezed-cat manifolds, preserve bit-flip bias, and partially correct single-photon loss without reservoir engineering.
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Bit flips, saturation, and quantum chaos in dissipative cat qubits
Saturation of bit-flip suppression in cat qubits originates from chaotic dynamics in memory-buffer interactions when adiabatic approximation breaks and cross-Kerr plus dephasing are present.
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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.