Entanglement purification based on hybrid entangled state using quantum-dot and microcavity coupled system

Area of Science:

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

Background:

• Entanglement is a key resource for quantum information processing.
• Developing robust entanglement purification protocols is crucial for overcoming decoherence.
• Hybrid quantum systems offer unique advantages for manipulating quantum states.

Purpose of the Study:

• To theoretically investigate an entanglement purification protocol for hybrid photon-electron entangled states.
• To explore the use of a quantum-dot spin and microcavity coupled system for this protocol.
• To demonstrate the construction of a parity check gate for quantum non-demolition measurements.

Main Methods:

• Theoretical investigation of a quantum entanglement purification protocol.
• Utilizing a quantum-dot spin and microcavity coupled system.
• Constructing a parity check gate for spin parity measurement.

Main Results:

• A theoretical framework for entanglement purification using hybrid entangled states was established.
• The proposed system successfully implements a parity check gate.
• Quantum non-demolition measurement of spin parity is achieved.

Conclusions:

• The quantum-dot spin and microcavity coupled system is a viable platform for entanglement purification.
• The developed protocol advances quantum information processing capabilities.
• This work provides a novel experimental platform for hybrid quantum information processing.