The Interaction between M-Configuration Five-Level Atom and a Single Mode Cavity Field

N. H. Abdel-Wahab, Lamia E. Thabet

N. H. Abdel-Wahab, Ahmed Salah

Arkan Hassan, Julio R. Gea-Banacloche

We show that the simultaneous interaction of two single-photon fields with a single atom in the V configuration can, in principle, produce a conditional phase gate of arbitrarily high fidelity, for an appropriate choice of the interaction time, as long as the fields can be described by a single temporal mode (as in an optical cavity); this requires a ``gated'' interaction, where, e.g., dynamical coupling techniques could be used to get the fields in and out of the cavity, and a large detuning induced by a strong external field could be used to turn the atom-field interaction on and off at the right times. With these assumptions, our analysis shows that the largest gate fidelities are obtained for a cavity containing a single atom, and that adding more atoms, in effect, ``dilutes'' the system's nonlinearity. We also study how spontaneous emission losses into noncavity modes degrade the fidelity, and consider as well a couple of alternate atomic level schemes, namely, two- and five-level systems.

Gao Yun-feng, Jian Feng, Ji‐Suo Wang +1 more

The cavity field spectrum of a cascade three-level atom interacting with a single-mode field in an ideal cavity is investigated. When the atom is in the upper level and the field is vacuum initially,the number of Rabi peaks changes according to 2→6→4→2→4 with the increase of R=g2/g1,and all Rabi peaks disappear for R1 Three-peak,five-peak or seven-peak structure appear for weak initial fields,and single resonance peak appears for a st rong field. When the atom is in the middle level initially,the cavity field spectrum is of a two-peak structure with R=1 as the spectrum of Jaynes-Cummings model.

N. H. Abdel-Wahab

S. Abdel‐Khalek