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High fidelity quantum state transfer in electromechanical systems with intermediate coupling.

Jian Zhou1, Yong Hu2, Zhang-qi Yin3

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This study demonstrates high fidelity quantum state transfer in hybrid quantum systems. Researchers found that intermediate coupling strengths are key for efficient information transfer between superconducting qubits and nitrogen-vacancy centers.

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Area of Science:

  • Quantum Information Science
  • Hybrid Quantum Systems
  • Quantum Computing

Background:

  • Hybrid quantum systems leverage diverse subsystems for enhanced functionality.
  • Circuit electromechanical systems are gaining traction due to fabrication and photonic integration advantages.

Purpose of the Study:

  • To propose and investigate a scheme for high fidelity quantum state transfer.
  • To explore quantum state transfer between a superconducting qubit and a nitrogen-vacancy center in diamond.

Main Methods:

  • Utilizing a hybrid system with superconducting and nanomechanical resonators.
  • Numerical investigation of system dynamics and decoherence effects.
  • Analyzing quantum state transfer in different coupling regimes (small, intermediate, large).

Main Results:

  • High fidelity quantum state transfer is not supported in small or large coupling regimes.
  • Intermediate coupling regimes (J ~ g1 ~ g2) enable high fidelity quantum information transfer.
  • Decoherence effects were numerically investigated and considered in the analysis.

Conclusions:

  • The intermediate coupling regime offers a promising route for high fidelity quantum state transfer.
  • This work advances understanding of quantum state transfer in coupled resonator systems.
  • Potential for developing advanced quantum communication and computation technologies.