Document Details Document Type : Article In Journal  Document Title : Coherence-Driven Topological Transition in Quantum Metamaterials Coherence-Driven Topological Transition in Quantum Metamaterials   Subject : physics  Document Language : English  Abstract : We introduce and theoretically demonstrate a quantum metamaterial made of dense ultracold neutral atoms loaded into an inherently defect-free artificial crystal of light, immune to well-known critical challenges inevitable in conventional solid-state platforms. We demonstrate an all-optical control, on ultrafast time scales, over the photonic topological transition of the isofrequency contour from an open to closed topology at the same frequency. This atomic lattice quantum metamaterial enables a dynamic manipulation of the decay rate branching ratio of a probe quantum emitter by more than an order of magnitude. Our proposal may lead to practically lossless, tunable, and topologically reconfigurable quantum metamaterials, for single or few-photon-level applications as varied as quantum sensing, quantum information processing, and quantum simulations using metamaterials  ISSN : 0031-9007  Journal Name : PHYSICAL REVIEW LETTERS  Volume : 116  Issue Number : 16  Publishing Year : 1437 AH 2016 AD  Article Type : Article  Added Date : Sunday, August 13, 2017  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email P.K Jha Jha, P.K Investigator Doctorate   M Mrejen Mrejen, M Researcher Doctorate   C.H Wu Wu, C.H Researcher Doctorate   Y Rostovtsev Rostovtsev, Y Researcher Doctorate   Xiguang Zhang Zhang, Xiangqian Researcher Doctorate xiang@berkeley.edu Files File Name Type Description  42591.pdf pdf   Back To Researches Page