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The Anti-Matter Factory at CERN is gearing up, commissioning of the Extra LowENergy Antiprotons (ELENA) ring is ongoing and the first anti-protons areforeseen to circulate in the decelerator very soon. The unprecedented flux oflow energy antiprotons delivered by ELENA will open a new era for precisiontests with antimatter including laser and microwave spectroscopy and tests ofits gravitational behaviour. Here we propose a scheme to load the ultra coldanti-hydrogen atoms that will be produced by the GBAR experiment in an opticallattice tuned at the magic wavelength of the 1S-2S transition in order tomeasure this interval at a level comparable or even better than its mattercounter part. This will provide the most sensitive test of CPT symmetryparametrised in the framework of the Standard Model Extension.

Optical trapping of anti-hydrogen towards an atomic anti-clock