Affiliation:
1. College of Science China University of Petroleum Qingdao 266580 P.R. China
2. School of Mathematical Sciences Capital Normal University Beijing 100048 P.R. China
Abstract
AbstractEntanglement witnesses are economical tools for the experimental detection of quantum entanglement. Quantum algorithms for entanglement detection have recently attracted considerable attention. Based on block encoding techniques and state preparation methods, the implementation of several types of entanglement witnesses using quantum circuits without quantum state tomography is proposed. Further, explicit quantum circuits for the block encoding of some special matrices are presented.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Shandong Province
Fundamental Research Funds for the Central Universities