A Proposal to Measure Antimatter Gravity Using Ultracold Antihydrogen Atoms

Details A Proposal to Measure Antimatter Gravity Using Ultracold Antihydrogen Atoms A Proposal to Measure Antimatter Gravity Using Ultracold Antihydrogen Atoms

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004gregr..36..561w&link_type=abstract

General Relativity and Gravitation, v. 36, Issue 3, p. 561-570 (2004).

Physics

27

Scientific paper

The gravitational acceleration of antimatter has never been measured directly. Antihydrogen atoms, being both stable and neutral, are an ideal system for investigating antimatter gravity. Ultralow temperatures in the 10-100 μK range are desirable for practical experiments. It is proposed to cool positive antihydrogen ions using laser-cooled ordinary ions. Ultracold neutral antihydrogen atoms might then be obtained by photodetachment. The gravitational acceleration can readily be determined from the time-of-flight between the photodetachment laser pulse and an annihilation detector.

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