Scheme for Implementing an N -Qubit Phase Gate via Selective Atom–Field Interaction with Cavity Quantum Electrodynamics
Shao Xiao-Qiang, Jin Xing-Ri, Ai‐Dong Zhu, Zhang Shou, Kyu-Hwang Yeon · Chinese Physics Letters · 2008
A scheme for implementing a two-qubit phase gate with atoms sent through a high-Q optical cavity is proposed by choosing nonidentical coupling constants between the atoms and cavity. The atomic spontaneous emission can be suppressed due to the large atom-field detuning. Moreover, the scheme can be generalized to implement an N-qubit phase gate and the gating time does not change with an increase of the number of qubits.