An experimental setup for experiments with ultra-cold atoms

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• Anna Kowalczyk (Open University)
• Thursday 16 August 2012, 15:30-16:30
• Physics East 217.

If you have a question about this talk, please contact Vincent Boyer.

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Ultracold, neutral atoms are a potentially scalable platform to physically implement quantum information processing schemes. At the Open University we are particularly interesting in physical preparation of a “one-way” model of quantum computation. In this purpose we have designed a specific experimental set-up which is especially well-suited to the implementation of the “one-way” model of quantum computation. It includes a high numerical aperture lens and a spatial light modulator for creation of tightly focused optical dipole traps. Preparation of cold sample in a standard 6-beam MOT imposes restrictions on the optical access and the arrangement of additional components of the set-up. For our particular case, the tetrahedral MOT design is particularly appealing as it allows us to reduce the optical access requirement whilst using low power coils for the quadrupole magnetic field. We present a special case of 4 beam MOT operating at very acute angle, which allows to cool atoms to temperatures of order 40K. Atoms are then loaded into our tightly focused dipole trap. Ultracold atoms loaded into these traps can be laser-excited to Rydberg states that have strong, long-range, controllable interactions. The controllability of these interactions and the controllability of the geometry of the traps give us a highly versatile set-up to investigate the creation of multiparticle entangled states.

This talk is part of the Cold Atoms series.

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