Abstract
We first investigate the nonlinear optical response of a five-level tripod atomic system in electromagnetically induced transparency and then propose a 3-qubit phase gate protocol based on the fifth-order nonlinearity, The cross-phase modulation among the three weak fields induced by the fifth-order nonlinearity in electromagnetically induced transparency can produce the phase shift of order π, which can be used to realize the 3-qubit polarization phase gate. This protocol should have potential applications in quantum information processing.
| Original language | English |
|---|---|
| Pages (from-to) | 504-512 |
| Number of pages | 9 |
| Journal | Journal of the Optical Society of America B: Optical Physics |
| Volume | 25 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2008 |
| Externally published | Yes |