Quantum Interrogation and the Safer X-Ray

Kent, Adrian ; Wallace, David

HP Development Company

关键词: quantum information;    quantum interrogation;    quantum imaging;    low absorption imaging;   

RP-ID  :  HPL-2001-213

学科分类：计算机科学（综合）

美国|英语

来源: HP Labs

【 摘 要 】

We investigate quantum interrogation techniques which allow imaging information about semi-transparent objects to be obtained with lower absorption rates than standard classical methods. We show that a gain proportional to log N can be obtained when searching for defects in an array of N pixels, if it is known that at most M of the pixels can have transparencies different from a predetermined theoretical value. A logarithmic gain can also be obtained when searching for infrequently occurring large structure in arrays. Notes: David Wallace, Centre for Quantum Computation, Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK 3 Pages