Virtual Photon-Mediated Quantum State Transfer and Remote Entanglement between Spin Qubits in Quantum Dots Using...

Area of Science:

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

Background:

• Semiconductor spin qubits in quantum dots are promising for scalable quantum information processing.
• Achieving reliable quantum state transfer and entanglement between distant spin qubits remains a significant challenge.

Purpose of the Study:

• To propose a fast and high-fidelity quantum state transfer scheme for two spin qubits.
• To enable reliable entanglement generation between spatially separated spin qubits.

Main Methods:

• Utilizing virtual microwave photons as a mediator for quantum state transfer.
• Employing a superadiabatic pulse to suppress non-adiabatic transitions and enhance fidelity.
• Simulating the scheme under realistic experimental parameters and noise conditions.

Main Results:

• Achieved arbitrary quantum state transfer with 95.1% fidelity within 60 ns.
• Demonstrated robustness against experimental imperfections and environmental noise.
• Generated remote Bell entangled states with a fidelity of 97.6%.

Conclusions:

• The proposed scheme offers a fast and high-fidelity solution for quantum state transfer and entanglement in spin qubit systems.
• This method is compatible with realistic experimental conditions and noise levels.
• The approach lays groundwork for fault-tolerant quantum computation using spin quantum networks.