2015/03/04 by Yao Deng, Yao, Deng, Pei Pei +6
Computer Science · Physics and Astronomy · #FOS: Physical sciences #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Physics (quant-ph) #Quantum optics and atomic interactions
paper · pdf · doi:10.48550/arxiv.1503.01310
openalex publication_date 2015/03/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A robust scheme for unknown entangled state transfer and C-Not gate implemented between two spatially separated atoms is proposed. It is shown that, in the effective three-atom Ising model, two-atom unknown entangled state can be transferred from one pair of atoms to another deterministically by only repeating a simple operation of turning on/off local laser field applied on atom for two times at controlling time \fracπ2Ω0. The whole time cost is less than \frac3π2Ω0. The successful probability and the fidelity are almost 100% for small atomic spontaneous emission rate. Deterministic two-atom C-Not gate can also be implemented in this model by just turning on/off the local laser field applied on the single target atom and leaving the controlling atom in its cavity alone for a while. The whole time cost is less than \fracπ2Ω0+\frac3πΔ2g2. It is demonstrated that the scheme is insensitive to cavity leakage and fiber loss.