Limitations of teleporting a qubit via a two-mode squeezed state

作     者：SEOK HYUNG LIE HYUNSEOK JEONG 

作者机构：Center for Macroscopic Quantum Control Department of Physics and Astronomy Seoul National University 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2019年第7卷第5期

页      面：I0001-I0007页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：National Research Foundation of Korea(NRF)(2010-0018295) Korea Institute of Science and Technology(KIST)(2E27800-18-P043) 

主　　题：teleport a photonic qubit experimentally demonstrated photon loss decreases 

摘      要：Recently, a teleportation scheme using a two-mode squeezed state to teleport a photonic qubit, so called a“hybrid approach, has been suggested and experimentally demonstrated as a candidate to overcome the limitations of all-optical quantum information processing. We find, however, that there exists the upper bound of fidelity when teleporting a photonic qubit via a two-mode squeezed channel under a lossy *** increase of photon loss decreases this bound, and teleportation better than this limit is impossible even when the squeezing degree of the teleportation channel becomes infinity. Our result indicates that the hybrid scheme can be valid for fault-tolerant quantum computing only when the photon loss rate can be suppressed under a certain limit.