Quantum State Transfer and Communication in Superconducting Networks
Summary
Quantum state transfer in superconducting networks involves the coherent exchange of quantum information between spatially separated nodes, typically embodied by superconducting qubits coupled via microwave photons. This process relies on precisely engineered interactions that preserve coherence and entanglement, enabling modular architectures for scalable quantum processors. Key challenges include mitigating losses in transmission lines, shaping photon wave packets for high-fidelity absorption and compensating environmental memory effects. Advances in parametric coupling, frequency multiplexing and router modules have demonstrated deterministic state exchange, remote entanglement generation and error-detection protocols. Practical implementations span cavity-to-cavity transfer, on-chip quantum routers and waveguide-based networks. These developments are crucial for realizing distributed quantum computing, robust quantum communication within cryogenic platforms and ultimately the quantum internet.
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Quantum State Transfer and Communication in Superconducting Networks publication trend
The graph below shows the total number of articles in quantum state transfer and communication in superconducting networks across all publications each year (not limited to Nature Index journals).
Technical terms
Superconducting qubit: A two-level quantum system realised in superconducting circuits, typically using Josephson junctions, that serves as the basic unit of quantum information.
Microwave photon: A quantised excitation of the microwave electromagnetic field used to carry quantum information between superconducting nodes.
Wave packet shaping: The design of the temporal and spectral profile of flying photon modes to optimise emission and absorption efficiencies.
Parametric drive: A time-dependent modulation of circuit parameters (e.g. frequency or coupling) that induces controlled interactions between modes.
Multiplexing: The simultaneous transmission of multiple quantum channels within a single network, achieved by distinguishing modes in time or frequency.
Fidelity: A figure of merit quantifying the overlap between the ideal and the actual quantum state after a transfer process.
Non-Markovian effect: The influence of environmental memory on a quantum system, leading to deviations from memoryless (Markovian) dynamics.
References
- Realizing all-to-all couplings among detachable quantum modules using a microwave quantum state router. npj Quantum Information (2023).
- Deterministic generation of shaped single microwave photons using a parametrically driven coupler. Physical Review Applied (2023).
- Multiplexed quantum state transfer in waveguides. Physical Review Research (2024).
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