Title | Cavity QED quantum phase gates for a single longitudinal mode of the intracavity field |
Publication Type | Journal Article |
Year of Publication | 2004 |
Authors | García-Maraver, R, Corbalán, R, Eckert, K, Rebic, S, Artoni, M, Mompart, J |
Journal | Phys. Rev. A |
Volume | 70 |
Pagination | 062324 |
Date Published | Dec |
Abstract | A single three-level atom driven by a longitudinal mode of a high-Q cavity is used to implement two-qubit quantum phase gates for the intracavity field. The two qubits are associated with the zero- and one-photon Fock states of each of the two opposite circular polarization states of the field. The three-level atom mediates the conditional phase gate provided the two polarization states and the atom interact in a V-type configuration and the two-photon resonance condition is satisfied. Microwave and optical implementations are discussed with gate fidelities being evaluated against several decoherence mechanisms such as atomic velocity fluctuations or the presence of a weak magnetic field. The use of coherent states for both polarization states is investigated to assess the entanglement capability of the proposed quantum gates. |
URL | https://link.aps.org/doi/10.1103/PhysRevA.70.062324 |
DOI | 10.1103/PhysRevA.70.062324 |
