Abstract
We study the interaction of two photons in a Rydberg atomic ensemble under the condition of electromagnetically induced transparency, combining a semiclassical approach for pulse propagation and a complete quantum treatment for quantum state evolution. We find that the blockade regime is not suitable for implementing photon-photon cross-phase modulation due to pulse absorption and dispersion. However, approximately ideal cross-phase modulation can be realized based on relatively weak interactions, with counterpropagating and transversely separated pulses.
| Original language | English |
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| Article number | 133606 |
| Journal | Physical Review Letters |
| Volume | 112 |
| Issue number | 13 |
| DOIs | |
| State | Published - 4 Apr 2014 |
| Externally published | Yes |