Objective
Magnetically trapped spin-polarized atomic hydrogen at ultralow temperatures (T<10 mK) and high densities (n>1013 atoms/cm3) represents the unique realization of a bosonic quantum gas. Temperature and density of the ensemble can be most accurately determined by optical spectroscopy (`Doppler thermometry'). Optical excitation also allows to cool the confined hydrogen gas. Both, optical diagnostics and cooling have been successfully demonstrated at the university of Amsterdam using pulsed one-photon excitation of the Lyman-alpha transition ( 12S - 22P). However, the one-photon transition suffers substantial limitations at temperatures T<1 mK and densities n>1010 atoms/cm3.
We propose a challenging novel approach which overcomes these limitations by two-photon excitation of the 32S/32D excited states. This approach provides a powerful diagnostic tool even in the ultimate regime of Bose condensation which has so far not been accessible to experiments. Furthermore, two-photon excitation offers a new method of optical cooling for a confined dense atomic sample which may allow to reach the Bose regime.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences physical sciences condensed matter physics quantum gases
- natural sciences physical sciences optics spectroscopy
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
1018 XE Amsterdam
Netherlands
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