Approximate and Conditional Teleportation of an Unknown Atomic State Without Bell-State Measurement with Two-Photon Interaction

• Published in: Communications in theoretical physics Vol. 45; no. 1; pp. 79 - 82
• Main Author: CHEN Chang-Yong
• Format: Journal Article
• Language: English
• Published: IOP Publishing 15.01.2006; State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathmatics, the Chinese Academy of Sciences, Wuhan 430071, China; Department of Physics and Information Engineering, Hunan Institute of Humanities, Science, and Technology, Loudi 417000, China
• Subjects: Bell态测量; QED腔; 俘获离子; 原子态; 双光子干涉; Bell-state measurement; teleportation; cavity QED; two-photon interaction
• ISSN: 0253-6102
• DOI: 10.1088/0253-6102/45/1/015

A scheme for approximately and conditionally teleporting an unknown atomic state via two-photon interaction in cavity QED is proposed. It is the extension of the scheme of Ref. [11] [Phys. Rev. A 69 （2004） 064302], which is based on Jaynes-Cummings model in QED and where only a time point of system evolution and the corresponding fidelity implementing the teleportation are given. In our scheme, the two-photon interaction Jaynes-Cummings model is used to realize the approximate and conditional teleportation. Our scheme does not involve the Bell-state measurement and an additional atom, only requiring two atoms and one single-mode cavity. The fidelity of the scheme is higher than that of Ref. [11]. The scheme may be generalized to not only the teleportation of the state of a cavity mode to another mode by means of a single atom but also the teleportation of the state of a trapped ion.