Entanglement of two impurities through electron scattering.

Area of Science:

• Quantum physics
• Condensed matter physics
• Quantum information science

Background:

• Entanglement is a key resource for quantum technologies.
• Controlling entanglement between solid-state qubits like magnetic impurities is challenging.

Purpose of the Study:

• To investigate a novel scheme for entangling two magnetic impurities in a solid.
• To determine the conditions and probabilities for achieving maximal entanglement.

Main Methods:

• Simulating electron scattering between two magnetic impurities.
• Analyzing the interaction of an electron's spin with impurity spins.
• Considering both ideal unitary interactions and realistic scattering amplitudes.

Main Results:

• Identified conditions for maximal entanglement between impurity spins with high success probability.
• Quantified entanglement as a function of electron-impurity interaction strength.
• Demonstrated a viable scheme for robust impurity spin entanglement.

Conclusions:

• Electron-mediated scattering provides an effective route to entangle magnetic impurities.
• The proposed method offers a promising approach for building quantum processors based on solid-state spins.