2003/12/17 by L. F. Wei, L. F Wei, Franco Nori +1
Computer Science · Physics and Astronomy · #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum error correction #Quantum gate #Quantum information #Quantum network #Quantum optics and atomic interactions #Quantum teleportation #Realizability #Scheme (mathematics) #Simple (philosophy) #quant-ph
paper · pdf · doi:10.1209/epl/i2003-10053-y
published as Europhys. Lett., 65(1), 1 (2004)
openalex publication_date 2003/12/17 · arxiv created 2005/12/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Several sequential operations are usually needed for implementing controlled quantum gates and generating entanglement between a pair of quantum bits. Based on the conditional quantum dynamics for a two-ion system beyond the Lamb-Dicke limit, here we propose a theoretical scheme for manipulating two-qubit quantum information, i.e. , implementing a universal two-qubit quantum gate and generating a two-qubit entangled state, by using a pair of simultaneous laser pulses. Neither the Lamb-Dicke approximation nor the auxiliary atomic level are required. The experimental realizability of this simple approach is also discussed.