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Researchers have developed an active measurement-based framework to aggregate Gottesman-Kitaev-Preskill (GKP) states without compressing phase-space lattice spacing, a critical advancement for continuous-variable quantum computing networks. By preserving code space geometry up to correctable deformations, this method overcomes the signal loss and distortion inherent in passive linear optics, enabling more robust distributed quantum routing. This theoretical breakthrough addresses key scalability hurdles that previously limited fault-tolerant aggregation of quantum information across optical networks.
Researchers Bound Cryptographic Leakage in GKP State Aggregation
Previously, aggregating quantum information using GKP codes compressed lattice spacing from 2√π to √2π, hindering network scalability. Now, a measurement-based framework preserves code space geometry up to correctable deformations, bypassing limitations of passive linear optics. This active approach enables secure, fault-tolerant routing of quantum states across a distributed network.
Nilesh Vyas of Airbus Central R&T and colleagues have developed an active, measurement-based framework for aggregating multiple Gottesman-Kitaev-Preskill (GKP) states, overcoming limitations of passive linear optics that compressed the phase-space lattice and caused quantum data loss. The method preserves the code space geometry up to correctable deformations, achieving a lattice spacing of √π, an improvement on the √2π resulting from previous passive approaches. A new technique combines quantum information across a network, resolving a key limitation in continuous-variable quantum computing systems.…
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