Berlin 2005 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 52: Quanteninformation III

Q 52.3: Vortrag

Dienstag, 8. März 2005, 17:30–17:45, HU Audimax

Integration of microoptics on atom chips — •Albrecht Haase¹, Marco Wilzbach¹, Michael Schwarz¹, Xiyuan Liu², Björn Hessmo³, Peter Horak⁴, and Jörg Schmiedmayer¹ — ¹Physikalisches Institut, Universität Heidelberg, 69120 Heidelberg — ²Lehrstuhl für Optoelektronik, Universität Mannheim, 69131 Mannheim — ³Royal Institute of Technology, Dept. of Microelectronics and IT, S-16440 Kista, Sweden — ⁴Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK

To develop the atom chip towards an universal tool for quantum information processing, we explore the possibility of integrating micro-optical components for the preparation, manipulation, and detection of atomic qubit states. As a first step, we are working on the implementation of an integrated single atom detector based on an optical fibre cavity. Recently, first fibre cavities have been realized and tested in our labs. We describe the setups and report on experimental parameters characterizing the quality and stability of these micro cavities. Furthermore, we present a test setup involving a macroscopic low-finesse cavity. By working close to the concentric cavity limit, the resonator mode is strongly focussed and thus the atom-light coupling strength is enhanced. This should make single atom resolution feasible. We show experimental results of magnetically guided atoms which have been detected using this cavity.