Enhanced quantum state transfer: Circumventing quantum chaotic behavior
arXiv:2402.00936 · doi:10.1038/s41467-024-48791-3
Abstract
The ability to realize high-fidelity quantum communication is one of the many facets required to build generic quantum computing devices. In addition to quantum processing, sensing, and storage, transferring the resulting quantum states demands a careful design that finds no parallel in classical communication. Existing experimental demonstrations of quantum information transfer in solid-state quantum systems are largely confined to small chains with few qubits, often relying upon non-generic schemes. Here, by using a large-scale superconducting quantum circuit featuring thirty-six tunable qubits, accompanied by general optimization procedures deeply rooted in overcoming quantum chaotic behavior, we demonstrate a scalable protocol for transferring few-particle quantum states in a two-dimensional quantum network. These include single-qubit excitation and also two-qubit entangled states, and two excitations for which many-body effects are present. Our approach, combined with the quantum circuit's versatility, paves the way to short-distance quantum communication for connecting distributed quantum processors or registers, even if hampered by inherent imperfections in actual quantum devices.
arXiv comment10 pages, 4 figures (main text); 14 pages, 20 figures (supplementary materials)
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- Synthetic -flux system in 2D superconducting qubit array with tunable coupling
- Perfect Wave Transfer in Continuous Quantum Systems
- State Transfer in Noisy Modular Quantum Networks
- From Bell Products to Greenberger-Horne-Zeilinger states: Quantum Memories via emergent Hamiltonians
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- Passive leakage removal unit based on a disordered transmon array