Persistent entanglement in arrays of interacting particles

Area of Science:

• Quantum Information Science
• Many-Body Physics

Background:

• Quantum entanglement is a key resource in quantum information processing.
• Understanding entanglement in multi-qubit systems is crucial for developing quantum technologies.

Purpose of the Study:

• To investigate the entanglement properties of N-qubit states generated via Ising-type interactions.
• To characterize the entanglement persistency and potential as an entanglement resource.

Main Methods:

• Generation of N-qubit states using arrays with Ising-type interactions.
• Quantification of entanglement using the Schmidt measure.
• Analysis of entanglement persistency through qubit measurement.

Main Results:

• The studied quantum states exhibit a large amount of entanglement, quantified by the Schmidt measure.
• These states demonstrate high entanglement persistency, requiring measurement of approximately N/2 qubits to disentangle.
• The states function as a valuable resource for generating other multiparticle entangled states, including generalized Greenberger-Horne-Zeilinger states.

Conclusions:

• N-qubit states generated with Ising interactions are robustly entangled.
• These states offer a practical pathway for creating diverse entangled states through measurement and classical communication.
• The findings highlight the potential of these states as a fundamental resource in quantum information science.