Invention:
This technology is a method of producing high-quality entanglement for quantum networking. It is a scalable, code-switching protocol for enhancing the fidelity of entangled states distributed across quantum repeaters. By using sequential rounds of quantum error correction and entanglement distillation with varying stabilizer codes to optimize the trade-off between fidelity and resource consumption, the approach allows for efficient and robust distillation strategies, adaptable to different network topologies and noise conditions, especially for depolarizing channels. With each round of distillation, error correction strategies are adjusted while keeping the total number of physical qubits constant. This adaptive approach boosts the rate and quality of output states achieved, enabling the development of improved quantum networks.
Background:
Entanglement distillation is a process in which many low-quality entangled states are converted into fewer highly entangled states. This process is fundamental in the development of quantum networking systems. Traditional fixed-code or non-error-correction-based distillation protocols often struggle to maintain fidelity across many repeater nodes. By using adaptive switching at different stages of distillation, this invention addresses both fidelity degradation and inefficiency in existing static approaches. Advanced entanglement distillation systems like this technology are needed to enable high-quality, stable quantum computing networks.
Applications:
- Quantum error correction
- Quantum networks
- Quantum communication
Advantages:
- Improved efficiency and fidelity of entangled states
- Adaptive code selection based on network operating point
- Increased rate of entanglement production
