Kavli Affiliate: Ke Wang
| First 5 Authors: Liang Xiang, Jiachen Chen, Zitian Zhu, Zixuan Song, Zehang Bao
| Summary:
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.
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