{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/34648"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/34648","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Progress towards an optimized ¹²⁹Xe / ³He Zeeman maser and a test of boost symmetry","abstract":"We report on a search for an annual variation of a daily sidereal modulation of the frequency difference between co-located ¹²⁹Xe and ³He Zeeman masers that sets a stringent limit on boost-dependent Lorentz and CPT violation involving the neutron, consistent with no effect at the level of 150 nHz. In the framework of the general Standard-Model Extension, our result provides the first clean test for the fermion sector of the symmetry of spacetime under boost transformations at a level of 10-27 GeV [1]. We also report progress on the optimization and operation of the Harvard-Smithsonian ¹²⁹Xe/³He dual noble gas maser. The ¹²⁹Xe/³He maser is the first device to sustain simultaneous active maser oscillations on distinct transitions in two intermingled atomic species, and it allows sensitive differential measurement of the ¹²⁹Xe and ³He nuclear spin-1/2 Zeeman transition frequencies [2, 3, 4]. The optimized ¹²⁹Xe /³He maser will be used for highly sensitive tests of Lorentz and CPT symmetry.","abstract_html":"We report on a search for an annual variation of a daily sidereal modulation of the frequency difference between co-located ¹²⁹Xe and ³He Zeeman masers that sets a stringent limit on boost-dependent Lorentz and CPT violation involving the neutron, consistent with no effect at the level of 150 nHz. In the framework of the general Standard-Model Extension, our result provides the first clean test for the fermion sector of the symmetry of spacetime under boost transformations at a level of 10-27 GeV [1]. We also report progress on the optimization and operation of the Harvard-Smithsonian ¹²⁹Xe/³He dual noble gas maser. The ¹²⁹Xe/³He maser is the first device to sustain simultaneous active maser oscillations on distinct transitions in two intermingled atomic species, and it allows sensitive differential measurement of the ¹²⁹Xe and ³He nuclear spin-1/2 Zeeman transition frequencies [2, 3, 4]. The optimized ¹²⁹Xe /³He maser will be used for highly sensitive tests of Lorentz and CPT symmetry.","abstract_has_math":false,"creators":["Canè, Federico"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Dept. of Physics.","school":null,"contributors":[],"advisors":["Ronald L. 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See provided URL for inquiries about permission."],"rights_urls":["http://dspace.mit.edu/handle/1721.1/34648","http://dspace.mit.edu/handle/1721.1/7582"],"identifier_entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://dspace.mit.edu/handle/1721.1/34648"],"render_values":[{"text":"http://dspace.mit.edu/handle/1721.1/34648","href":"http://dspace.mit.edu/handle/1721.1/34648","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/1721.1/34648","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Ronald L. Walsworth and Daniel Kleppner."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. Dept. of Physics."]},{"key":"dc:contributor.other","label":"Dc Contributor Other","values":["Massachusetts Institute of Technology. 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The ¹²⁹Xe/³He maser is the first device to sustain simultaneous active maser oscillations on distinct transitions in two intermingled atomic species, and it allows sensitive differential measurement of the ¹²⁹Xe and ³He nuclear spin-1/2 Zeeman transition frequencies [2, 3, 4]. The optimized ¹²⁹Xe /³He maser will be used for highly sensitive tests of Lorentz and CPT symmetry."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Ph.D."]},{"key":"dc:title","label":"Title","values":["Progress towards an optimized ¹²⁹Xe / ³He Zeeman maser and a test of boost symmetry"]}]}],"canonical_facts":{"dc:contributor.advisor":["Ronald L. Walsworth and Daniel Kleppner."],"dc:contributor.department":["Massachusetts Institute of Technology. Dept. of Physics."],"dc:contributor.other":["Massachusetts Institute of Technology. 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The ¹²⁹Xe/³He maser is the first device to sustain simultaneous active maser oscillations on distinct transitions in two intermingled atomic species, and it allows sensitive differential measurement of the ¹²⁹Xe and ³He nuclear spin-1/2 Zeeman transition frequencies [2, 3, 4]. The optimized ¹²⁹Xe /³He maser will be used for highly sensitive tests of Lorentz and CPT symmetry."],"dc:description.degree":["Ph.D."],"dc:identifier.uri":["http://dspace.mit.edu/handle/1721.1/34648","http://hdl.handle.net/1721.1/34648"],"dc:language.iso":["eng"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. 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