Quantum-state engineering with room-temperature atomic vapor

Speaker: Dr hab. Szymon Pustelny
Affiliation: Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science Jagiellonian University, Kraków, Poland
Link to MSTeams meeting

Due to their unique energy structure and ability of manipulation of an internal state through external fields (light, magnetic field, etc.), alkali-metal atoms are one of the most promising candidates for quantum technologies and quantum information science. In typical incarnations, such studies are performed using ultra-called atoms, where such problems as relaxation/decoherence or inhomogeneous broadening are significantly reduced. At the same time, operation under such conditions requires complex and expensive apparatus, which blocks commercialization of the systems. These challenges trigger an interest in cold atom ‘cousins’- room-temperature atomic vapors. Such vapor can be easily handle, and at the same time they proven their usefulness in numerous nonlinear/quantum optics experiments. Despite that their applicability in quantum information science and processing still remains an open question.
During the lecture, our research on quantum-state engineering with a room-temperature rubidium vapor will be present. We will discuss techniques of generating and manipulating quantum state of a long-lived ground state of rubidium atoms and present schemes of controllable modification of their multilevel energy structure, which are physical realization of qudit. Successively, the technique of reconstruction of the quantum state of the atoms, enabling verification of the processing protocols, will be presented. We will conclude with the discussion of the challenges of application of such systems in quantum simulations.

Seminar language: English
Chairman: Prof. Jarosław W. Kłos

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