Description
Non-Gaussian optical states are essential resources for continuous-variable quantum technologies, enabling fault-tolerant quantum computation, enhanced quantum communication protocols, and quantum metrology beyond the classical limit. However, their experimental generation typically relies on high-photon-number Fock states or strong optical non-linearities, making scalable implementations challenging.
We propose a unified optical platform that generates a broad class of non-Gaussian resource states using only Gaussian input states, optical parametric amplification, and heralded photon detection. Within a single architecture, we generate photon-added squeezed states with near-unit fidelity, cubic-phase-like states with fidelities exceeding 98%, and squeezed-cat states with fidelities above 99%. We further show that these squeezed-cat states can be bred into Gottesman-Kitaev-Preskill (GKP) states with effective squeezing beyond the 9.75 dB fault-tolerance threshold while requiring less than 3 dB of input squeezing.
By eliminating the need for pre-generated Fock-state resources and unifying the generation of multiple non-Gaussian states within a single experimentally accessible platform, this work provides a scalable route towards optical quantum communication, fault-tolerant quantum computing, and quantum metrology.
| I am the presenting author | Yes |
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