Enhanced quantum state transfer: Circumventing quantum chaotic behavior

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.

10 pages, 4 figures (main text); 14 pages, 20 figures (supplementary materials)

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Cited by in corpus (8)

• Parity-dependent state transfer for direct entanglement generation
• Synthetic $\pi$-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
• Remote entanglement generation via enhanced quantum state transfer
• Reshaping coupled bosonic networks: A bipartite-graph framework for optimal quantum excitation transfer
• Passive leakage removal unit based on a disordered transmon array