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DOE OSTI · 21450727

Spin-wave storage using chirped control fields in atomic frequency comb-based quantum memory

Minar, Jiri·Sangouard, Nicolas·Afzelius, Mikael·Riedmatten, Hugues de·Gisin, Nicolas
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Abstract

It has been shown that an inhomogeneously broadened optical transition shaped into an atomic frequency comb can store a large number of temporal modes of the electromagnetic field at the single-photon level without the need to increase the optical depth of the storage material. The readout of light modes is made efficient thanks to the rephasing of the optical-wavelength coherence similar to photon-echo-type techniques, and the reemission time is given by the comb structure. For on-demand readout and long storage times, two control fields are used to transfer the optical coherence back and forth into a spin wave. Here, we present a detailed analysis of the spin-wave storage based on chirped adiabatic control fields. In particular, we verify that chirped fields require significantly weaker intensities than {pi} pulses. The price to pay is a reduction of the multimode storage capacity that we quantify for realistic material parameters associated with solids doped with rare-earth-metal ions.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS74 ATOMIC AND MOLECULAR PHYSICSATOMSBOSONSCHARGED PARTICLESCONTROLDEPTHDIMENSIONSDOPED MATERIALSELECTROMAGNETIC FIELDSELECTROMAGNETIC RADIATIONELEMENTARY PARTICLESINFORMATIONIONSLINE BROADENINGMASSLESS PARTICLESMATERIALSPHOTONSPULSESQUANTUM INFORMATIONQUBITSRADIATIONSREADOUT SYSTEMSSOLIDSSPIN WAVESSTORAGEVISIBLE RADIATION

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Minar, Jiri, Sangouard, Nicolas, Afzelius, Mikael, Riedmatten, Hugues de, Gisin, Nicolas. 2010-10-15. Spin-wave storage using chirped control fields in atomic frequency comb-based quantum memory. https://doi.org/10.1103/physreva.82.042309

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