Rare Earth Doped Crystals for Optical Quantum Memories
Event details
| Date | 14.11.2013 |
| Hour | 16:30 › 17:30 |
| Speaker |
Dr Philippe Goldner Chimie Paristech, CNRS, Université Pierre et Marie Curie, Laboratoire de Chimie de la Matière Condensée de Paris, 11 rue Pierre et Marie Curie, 75005 Paris, France |
| Location | |
| Category | Conferences - Seminars |
Quantum information uses the superposition states of light or matter to perform new data processing or transmission tasks, which are impossible to obtain with classical states. Applications include quantum computing, which could dramatically speed up some calculations and optical quantum memories, devices able to store and release faithfully photonic quantum states. The latter could be used to extend the range of quantum cryptography, which allows one to transmit information with an unprecedented security and is commercially available. Although striking results have been obtained in atomic vapors and cold atomic clouds, solid state systems present the advantage of stability and simple cooling since low temperatures are needed in most cases. They also offer the opportunity to develop specific and highly efficient processing protocols. Rare earth doped crystals have recently been considered for these applications because of their long optical and hyperfine coherence lifetimes.
In this talk, we will present properties that crystals have to fulfill for quantum memories, with an emphasis on level structures, homogeneous and inhomogeneous linewidths. Recent results obtained in our group on storage time extension1-3 will then be discussed.
[1] M. Lovrić, D. Suter, A. Ferrier, and P. Goldner, “Faithful Solid State Optical Memory with Dynamically Decoupled Spin Wave Storage,” Phys. Rev. Lett., 111 (2013) 020503.
[2] F. Beaudoux, O. Guillot-Noël, J. Lejay, A. Ferrier, and P. Goldner, "Concentration dependence of absorption and optical and hyperfine transition dynamics in Pr3+:La2(WO4)3," J. Phys. B: At. Mol. Opt. Phys., 45 (2012) 124014. Special issue on quantum memories.
[3] M. Lovric, P. Glasenapp, D. Suter, B. Tumino, P. Goldner, M. Sabooni, L. Rippe, and S. Kröll, "Hyperfine characterization and spin coherence lifetime extension in Pr3+:La2(WO4) 3," Phys. Rev. B, 84 (2011) 104417.
In this talk, we will present properties that crystals have to fulfill for quantum memories, with an emphasis on level structures, homogeneous and inhomogeneous linewidths. Recent results obtained in our group on storage time extension1-3 will then be discussed.
[1] M. Lovrić, D. Suter, A. Ferrier, and P. Goldner, “Faithful Solid State Optical Memory with Dynamically Decoupled Spin Wave Storage,” Phys. Rev. Lett., 111 (2013) 020503.
[2] F. Beaudoux, O. Guillot-Noël, J. Lejay, A. Ferrier, and P. Goldner, "Concentration dependence of absorption and optical and hyperfine transition dynamics in Pr3+:La2(WO4)3," J. Phys. B: At. Mol. Opt. Phys., 45 (2012) 124014. Special issue on quantum memories.
[3] M. Lovric, P. Glasenapp, D. Suter, B. Tumino, P. Goldner, M. Sabooni, L. Rippe, and S. Kröll, "Hyperfine characterization and spin coherence lifetime extension in Pr3+:La2(WO4) 3," Phys. Rev. B, 84 (2011) 104417.
Practical information
- General public
- Free
Organizer
- Dr Frank van Mourik