Giant Cross–Kerr Effect for Propagating Microwaves Induced by an Artificial Atom

作     者：Io-Chun Hoi Anton F. Kockum Tauno Palomaki Thomas M. Stace Bixuan Fan Lars Tornberg Sankar R. Sathyamoorthy Göran Johansson Per Delsing C. M. Wilson 

作者机构：Department of Microtechnology and Nanoscience (MC2) Chalmers University of Technology SE-412 96 Göteborg Sweden Centre for Engineered Quantum Systems School of Physical Sciences University of Queensland Saint Lucia Queensland 4072 Australia Institute for Quantum Computing and Electrical and Computer Engineering Department University of Waterloo Waterloo N2L 3G1 Canada 

出 版 物：《Physical Review Letters》 (Phys Rev Lett)

年 卷 期：2013年第111卷第5期

页      面：053601-053601页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：European Commission, EC Seventh Framework Programme, FP7, (284566, 247208, 248629) Seventh Framework Programme, FP7 

主　　题：MICROWAVE photonics ATOMS PARTICLE interactions KERR electro-optical effect SUPERCONDUCTING composites COPLANAR transmission lines SINGLE photon generation 

摘      要：We investigate the effective interaction between two microwave fields, mediated by a transmon-type superconducting artificial atom which is strongly coupled to a coplanar transmission line. The interaction between the fields and atom produces an effective cross–Kerr coupling. We demonstrate average cross–Kerr phase shifts of up to 20 degrees per photon with both coherent microwave fields at the single-photon level. Our results provide an important step toward quantum applications with propagating microwave photons.