Dynamics of the reading process of a quantum memory
arXiv:1309.2235 · doi:10.1088/1367-2630/15/7/075030
Abstract
The mechanism of extraction of information stored in a quantum memory is studied here in detail. We consider memories containing a single excitation of a collective atomic state, which is mapped into a single photon during the reading process. A theory is developed for the wavepacket of the extracted photon, leading to a simple analytical expression depending on the key parameters of the problem, like detuning and intensity of the read field and the number of atoms in the atomic ensemble. This theory is then compared to a large set of experimental situations and a satisfactory quantitative agreement is obtained. In this way, we are able to systematically study the saturation and spectrum of the reading process, as well as clarify the role of superradiance in the system.
25 pages (one-column format), 8 figures
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Cited by in corpus (9)
- A Waveguide Frequency Converter Connecting Rubidium Based Quantum Memories to the Telecom C-Band
- Single-Photon Superradiance in Cold Atoms
- Focus on Quantum Memories
- Experimental Fock-State Superradiance
- Coherent Control of Collective Spontaneous Emission through Self-interference
- Heralded generation of single photons entangled in multiple temporal modes with controllable waveforms
- Size-Reduction of Rydberg collective excited states in cold atomic system
- Optimal Photon Generation from Spontaneous Raman Processes in Cold Atoms
- Fock-state superradiance in a cold atomic ensemble