Heralded noiseless linear amplification and distillation of entanglement

• DOI: 10.1038/nphoton.2010.35
• Publication Date: 2010-03-28T17:18:21Z
• Authors: G. Y. Xiang; T. C. Ralph; A. P. Lund; N. Walk; G. J. Pryde
• Keywords: States; Teleportation; Quantum information; computation and communication; 2504 Electronic; Mathematical sciences; Variable quantum cryptography; 3107 Atomic and Molecular Physics; 01 natural sciences; Physical sciences; 0103 physical sciences; Optical and Magnetic Materials; and Optics; 190

A noiseless linear amplifier for quantum states of an optical field is demonstrated. The amplifier is also used to enhance entanglement through a technique known as distillation. Such amplification and distillation may be useful for quantum cloning, metrology and communications.