Bias-Preserving Gates and Quantum Error Correction With Dual-Rail Cat Codes
A new arXiv preprint addresses fault-tolerant quantum computation using bosonic qubits, focusing on dual-rail and cat encodings together with bias-preserving gates. The authors frame the problem around the need for universal logical operations, suppression of hardware-specific noise, and efficient handling of photon-loss errors, noting that each encoding alone has attractive features but also important limitations.
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What this could mean
- 0–2 yearsPlausible
If the proposed dual-rail cat code construction can be implemented in existing superconducting cavity or photonic platforms, it could enable near-term experiments demonstrating bias-preserving gates and error correction that simultaneously address photon loss and hardware noise.
Cat-code and dual-rail qubits have already been demonstrated in superconducting cavities and photonic systems, so combining them into a dual-rail cat code and applying bias-preserving control is primarily a code design and control pulse problem rather than requiring new hardware; this makes a two-year experimental demonstration plausible.
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