Atomic entanglement purification using photonic Faraday rotation

• Published in: Quantum information processing Vol. 13; no. 4; pp. 881 - 893
• Main Authors: Sheng, Yu-Bo, Zhao, Sheng-Yang, Liu, Jiong, Zhou, Lan
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.04.2014; Springer
• Subjects: Applied sciences; Cavity quantum electrodynamics ; micromasers; Classical and quantum physics: mechanics and fields; Computer science; control theory; systems; Computer systems and distributed systems. User interface; Data Structures and Information Theory; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Mathematical Physics; Optics; Physics; Physics and Astronomy; Quantum communication; Quantum computation; Quantum Computing; Quantum information; Quantum Information Technology; Quantum optics; Quantum Physics; Software; Spintronics; Entanglement purification; Photonic Faraday rotation; Quantum communication; Quantum computing; Input-output; Purification; Quantum electrodynamics; Faraday effect; Quantic entanglement; Single photon source
• ISSN: 1570-0755; 1573-1332
• DOI: 10.1007/s11128-013-0698-2

We describe an entanglement purification protocol (EPP) for atomic entangled pair using photonic Faraday rotation. Through the two single-photon input–output process in cavity quantum electrodynamics (QED), it is shown that the high-quality entangled atomic states can be obtained from the low-quality mixed entangled atomic states. Different from other EPPs, the two pairs of mixed states do not need to intact directly. As the photonic Faraday rotation works on the low-Q cavities, this EPP is useful in both quantum communication and computation.