Quantum gate operations using atomic qubits through cavity input-output processJ. Song1, Y. Xia2 and H.-S. Song1
1 School of Physics and Optoelectronic Technology, Dalian University of Technology - Dalian 116024, China
2 Department of Physics, Fuzhou University - Fuzhou 350002, China
received 9 July 2009; accepted in final form 26 August 2009; published September 2009
published online 24 September 2009
We propose two deterministic schemes to implement quantum swap gate and Fredkin gate encoded by atomic qubits through the input-output process of the cavity. We show that these schemes can be extended to realize multi-qubit gate operations. By numerical calculation, the fidelity and photon loss probability for implementing quantum swap gate between photon and atom are also discussed.
03.67.Hk - Quantum communication.
03.65.Ud - Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.).
© EPLA 2009