Coherent control of collective atom phase for ultralong, inversion-free photon echoes
arXiv:1110.3478 · doi:10.1103/PhysRevA.85.031402
Abstract
To overcome fundamental limitations of the πoptical pulse-induced population inversion and optical decay-caused short storage time in conventional photon echoes, a coherent control of collective atoms is studied for inversion-free, optical decay-halted photon echoes, where the constraint of photon storage time is now replaced by a spin population decay process. Using phase-controlled double rephasing, an inversion-free photon echo scheme is obtained, where no spontaneous or stimulated emission-driven quantum noise exists. Thus, the present method can be applied for ultralong quantum memories in quantum repeaters for long-distance quantum communications.
4 pages, 4 figures
References in corpus (4)
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- On-demand control of photon echoes far exceeding the spin coherence constraint via coherence swapping between optical and spin transitions
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- Collective atom phase controls in photon echoes for quantum memory applications I: Population inversion removal
- Understanding of collective atom phase control in modified photon echoes for a near perfect, storage time extended quantum memory
- A controlled ac Stark echo for quantum memories
- Analysis of controlled Rabi flopping in a double rephasing photon echo scheme for quantum memories