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Hole burning study of Tm3+:YAG hyperfine structure for quantum storage applications

Philippe Goldner, O. Guillot-Noël, Anne Louchet-Chauvet +5 more

Journal of LuminescenceFeb 9, 20060 citations

Calculations of rare earth hyperfine structures and application to quantum information

Philippe Goldner, O. Guillot-Noël

Journal of Alloys and CompoundsApr 17, 20076 citations

Optical excitation of nuclear spin coherence in a Tm3+:YAG crystal

Anne Louchet-Chauvet, Y. Le Du, Fabien Bretenaker +6 more

A thulium-doped crystal is experimentally shown to be an excellent candidate for broadband quantum storage in a solid-state medium. The nuclear spin coherence is optically excited, detected, and characterized in such a crystal. The lifetime of the spin coherence---the potential storage entity---is measured by means of a new Raman echo protocol to be about $300\text{ }\ensuremath{\mu}\text{s}$ over a wide range of ground state splittings. This flexibility, which is attractive for broadband operation and well fitted to existing quantum sources, results from the simple hyperfine structure, which contrasts to Pr- and Eu-doped crystals.A thulium-doped crystal is experimentally shown to be an excellent candidate for broadband quantum storage in a solid-state medium. The nuclear spin coherence is optically excited, detected, and characterized in such a crystal. The lifetime of the spin coherence---the potential storage entity---is measured by means of a new Raman echo protocol to be about $300\text{ }\ensuremath{\mu}\text{s}$ over a wide range of ground state splittings. This flexibility, which is attractive for broadband operation and well fitted to existing quantum sources, results from the simple hyperfine structure, which contrasts to Pr- and Eu-doped crystals.

arXiv:0710.3231Physical Review BMay 14, 200833 citations

Experimental Tailoring of a Three-Level Lambda System in Tm3+:YAG

F. de Sèze, Anne Louchet-Chauvet, Vincent Crozatier +5 more

Quantum information transfer from light to atom ensembles and vice versa has both basic and practical importance. Among the relevant topics let us mention entanglement and decoherence of macroscopic systems, together with applications to quantum memory for long distance quantum cryptography. Although the first experimental demonstrations have been performed in atomic vapors and clouds, rare earth ion doped crystals are also interesting media for such processes. In this paper we address Tm3+ ions capability to behave as three-level lambda systems, a key ingredient to convert optical excitation into a spontaneous- emission-free spin wave. Indeed Tm3+ falls within reach of light sources that can be stabilized easily to the required degree. In the absence of zero-field hyperfine structure we apply an external magnetic field to lift the nuclear spin degeneracy in Tm3+:YAG. We experimentally determine the gyromagnetic tensor components with the help of spectral hole-burning techniques. Then appropriate orientation of the applied field enables us to optimize the transition probability ratio along the two legs of the lambda. The resulting three-level lambda system should suit quantum information processing requirements.Quantum information transfer from light to atom ensembles and vice versa has both basic and practical importance. Among the relevant topics let us mention entanglement and decoherence of macroscopic systems, together with applications to quantum memory for long distance quantum cryptography. Although the first experimental demonstrations have been performed in atomic vapors and clouds, rare earth ion doped crystals are also interesting media for such processes. In this paper we address Tm3+ ions capability to behave as three-level lambda systems, a key ingredient to convert optical excitation into a spontaneous- emission-free spin wave. Indeed Tm3+ falls within reach of light sources that can be stabilized easily to the required degree. In the absence of zero-field hyperfine structure we apply an external magnetic field to lift the nuclear spin degeneracy in Tm3+:YAG. We experimentally determine the gyromagnetic tensor components with the help of spectral hole-burning techniques. Then appropriate orientation of the applied field enables us to optimize the transition probability ratio along the two legs of the lambda. The resulting three-level lambda system should suit quantum information processing requirements.

Sep 14, 20052 citations

Materials for optical memory: Resolved hyperfine structure in KY3F10:Ho3+

Marina N. Popova

Optical MaterialsApr 8, 20137 citations

Stimulated optical pumping in a Tm3+:YAG crystal

Guillaume Gorju, Anne Louchet-Chauvet, David Pabœuf +7 more

The possibility of using stimulated emission to improve the optical pumping of Tm3+ ions embedded in Tm3+:YAG to the 3F4 level is explored. The oscillator strengths and the frequencies of the transitions between the ground crystal field level of 3H4 to the different crystal field levels of 3F4 are measured at low temperature. Stimulated emission measurements at 1461 nm are performed to evaluate the optical pumping efficiency. Application to the spectral tailoring of Tm3+:YAG for quantum information applications is discussed.The possibility of using stimulated emission to improve the optical pumping of Tm3+ ions embedded in Tm3+:YAG to the 3F4 level is explored. The oscillator strengths and the frequencies of the transitions between the ground crystal field level of 3H4 to the different crystal field levels of 3F4 are measured at low temperature. Stimulated emission measurements at 1461 nm are performed to evaluate the optical pumping efficiency. Application to the spectral tailoring of Tm3+:YAG for quantum information applications is discussed.

Journal of Physics Condensed MatterSep 4, 20076 citations

Hyperfine structure of Tm3+ in YAG for quantum storage applications

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