Building Block For Universal Continuous Variables Computation In Superconducting Devices

• URL: http://arxiv.org/abs/2604.00212v2
• Date: Thu, 02 Apr 2026 23:59:32 GMT
• Title: Building Block For Universal Continuous Variables Computation In Superconducting Devices
• Abstract summary: Continuous variable (CV) quantum computation offers an alternative to qubit-based computing.<n>We numerically simulate a two-layer superconducting architecture that implements all five interactions of the universal CV gate set.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Continuous variable (CV) quantum computation offers an alternative to qubit-based computing by exploiting the infinite-dimensional Hilbert space of bosonic modes. Despite recent progress, superconducting platforms have yet to demonstrate a scalable architecture capable of universal computation. Here, we design and numerically simulate a two-layer superconducting architecture that implements all five interactions of the universal CV gate set (rotation, displacement, squeezing, Kerr, and beam splitter) within experimentally accessible regimes. To this end, we employ a DC-SQUID as the bosonic mode, a fluxonium qubit to mediate nonlinear interactions, and two ancillary qubits that enable Gaussian and multi-mode operations. By tuning fluxes and frequencies, we achieve high fidelities ($\geq 98\%$) across all gates within state-of-the-art parameter ranges. The modular nature of the design allows straightforward scaling, establishing a feasible pathway toward high-fidelity, universal CV quantum computation based on superconducting circuits.

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