Homomorphic Aggregation of Continuous-Variable GKP States
A preprint on arXiv proposes a scheme for homomorphic aggregation of continuous-variable Gottesman-Kitaev-Preskill (GKP) states. The work describes combining multiple GKP-encoded qubits while preserving error-correction structure, without full decoding of the logical information. It addresses operations on bosonic codes for fault-tolerant quantum computing.
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What this could mean
- 0–2 yearsPlausible
This could allow near-term experimental platforms using GKP states, such as superconducting cavity QED or photonic systems, to test distributed or multi-qubit operations with reduced decoding overhead.
GKP states have already been demonstrated in superconducting microwave cavities and optical setups, so the main precondition is adapting the proposed aggregation protocol to existing experimental control. If the protocol requires only standard homodyne detection and Gaussian operations already available in these labs, a proof-of-principle could follow within two years.
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