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Area of Science:

  • Quantum Information Science
  • Solid-State Quantum Systems
  • Quantum Computing

Background:

  • High-fidelity quantum communication is crucial for quantum computing.
  • Current solid-state quantum systems have limitations in transferring quantum states, often restricted to small-scale, non-generic schemes.
  • Quantum state transfer requires specialized design distinct from classical communication.

Purpose of the Study:

  • To demonstrate a scalable protocol for transferring few-particle quantum states in a two-dimensional quantum network.
  • To overcome limitations of existing experimental demonstrations in solid-state quantum systems.
  • To explore the potential for short-distance quantum communication in connecting distributed quantum processors.

Main Methods:

  • Utilized a superconducting quantum circuit with thirty-six tunable qubits.
  • Employed general optimization procedures to manage quantum chaotic behavior.
  • Developed a two-dimensional quantum network architecture.

Main Results:

  • Successfully demonstrated scalable transfer of single-qubit excitations.
  • Showcased the transfer of two-qubit entangled states with high fidelity.
  • Achieved transfer of two excitations, including complex many-body effects.
  • Validated the protocol in a versatile quantum circuit.

Conclusions:

  • The developed protocol offers a scalable solution for quantum state transfer in solid-state systems.
  • This approach is suitable for short-distance quantum communication, linking distributed quantum processors or registers.
  • The method shows promise even with inherent imperfections in quantum devices, paving the way for practical quantum networks.