[{"das_tickbox":"1","supervisor":[{"id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2031-204X","full_name":"Hosten, Onur","last_name":"Hosten","first_name":"Onur"}],"keyword":["entanglement-enhanced atom interferometry","cavity QED","spin-squeezing","dipole trap","quantum optics"],"file":[{"creator":"swald","access_level":"open_access","embargo":"2026-06-15","relation":"main_file","date_updated":"2026-06-15T22:30:03Z","file_name":"2025_Wald_Sebastian_Thesis.pdf","file_size":47536855,"date_created":"2025-12-12T11:53:42Z","checksum":"1be72faf529a5e8a2d03cb3d5f808b77","content_type":"application/pdf","file_id":"20809"},{"access_level":"closed","relation":"source_file","creator":"swald","file_name":"2025_Wald_Sebastian_Thesis.zip","file_size":40127601,"date_updated":"2026-06-15T22:30:03Z","date_created":"2025-12-12T11:54:55Z","file_id":"20810","content_type":"application/x-zip-compressed","checksum":"8c3a1904dceb4bcd04bc9f14b2594bab","embargo_to":"open_access"}],"day":"11","author":[{"first_name":"Sebastian","last_name":"Wald","id":"133F200A-B015-11E9-AD41-0EDAE5697425","orcid":"0000-0002-5869-1604","full_name":"Wald, Sebastian"}],"page":"152","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","related_material":{"record":[{"relation":"part_of_dissertation","status":"public","id":"14759"}]},"type":"dissertation","file_date_updated":"2026-06-15T22:30:03Z","fulldoi":"https://doi.org/10.15479/AT-ISTA-20798","date_updated":"2026-07-24T08:07:28Z","month":"12","has_accepted_license":"1","title":"Atoms in a propagating-wave cavity for squeezed Mach-Zehnder atom interferometry","OA_place":"publisher","date_created":"2025-12-11T11:48:11Z","department":[{"_id":"GradSch"},{"_id":"OnHo"}],"oa":1,"article_processing_charge":"No","language":[{"iso":"eng"}],"degree_awarded":"PhD","ddc":["530"],"OA_embargo":"6","year":"2025","status":"public","date_published":"2025-12-11T00:00:00Z","alternative_title":["ISTA Thesis"],"_id":"20798","doi":"10.15479/AT-ISTA-20798","doi_confirm":"1","corr_author":"1","abstract":[{"text":"Atom interferometers measure the relative phase shifts between coherent matter-wave paths\r\nthat arise from interactions with external fields or inertial forces. Due to their exceptional\r\nphase sensitivity, atom interferometers became an essential tool for precision measurements\r\nand fundamental physics experiments, finding applications in geodesy, gravimetry, and inertial\r\nnavigation. However, their measurement precision is limited by quantum projection noise,\r\nwhich arises from the Heisenberg uncertainty principle, preventing the measurement of atomic\r\nstates with absolute precision. The generation of entanglement between the atoms offers a\r\npath to surpass this so-called standard quantum limit, thereby enhancing the interferometer’s\r\nphase sensitivity beyond classical measurement bounds.\r\nThis thesis reports on the development of an atom interferometer experiment designed to\r\nrealize cavity-mediated, squeezed Mach-Zehnder-type interferometry with ultra-cold 87Rb atoms.\r\nThe experiment combines cavity-aided spin-squeezing with cavity-mediated Mach-Zehnder\r\ninterferometry to demonstrate entanglement-enhanced phase sensitivity. The experiment is\r\ncentered on a triangular optical cavity that mediates all relevant atom-light interactions. The\r\ncavity provides optical trapping, spin-squeezing, and Raman beam-splitter operations, enabling\r\nto perform interferometry on a continuously trapped atomic ensemble.\r\nThe thesis elaborates on the fundamental theoretical framework, the cavity design, and the full\r\noptical setup, including the detailed configuration of the developed laser stabilization methods.\r\nExperimentally, continuous loading methods were explored, resulting in an accumulation of\r\nup to 4 × 106\r\natoms in the dipole trap within a cycle time of 500 ms. The AC Stark shift\r\ncompensation method developed for continuous loading was further applied for in-trap cooling\r\nto 10 µK, and optical pumping for efficient atomic state preparation. Coherent state control\r\nwas verified via observation of microwave-driven Rabi oscillations, and used to characterize\r\natom-cavity coupling.\r\nThese presented results establish the experimental groundwork for the future development of\r\ncavity-mediated, entanglement-enhanced Mach-Zehnder-type atom interferometry.","lang":"eng"}],"oa_version":"Published Version","tmp":{"short":"CC BY-NC (4.0)","name":"Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)","legal_code_url":"https://creativecommons.org/licenses/by-nc/4.0/legalcode","image":"/images/cc_by_nc.png"},"citation":{"apa":"Wald, S. (2025). <i>Atoms in a propagating-wave cavity for squeezed Mach-Zehnder atom interferometry</i>. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT-ISTA-20798\">https://doi.org/10.15479/AT-ISTA-20798</a>","ama":"Wald S. Atoms in a propagating-wave cavity for squeezed Mach-Zehnder atom interferometry. 2025. doi:<a href=\"https://doi.org/10.15479/AT-ISTA-20798\">10.15479/AT-ISTA-20798</a>","ieee":"S. Wald, “Atoms in a propagating-wave cavity for squeezed Mach-Zehnder atom interferometry,” Institute of Science and Technology Austria, 2025.","chicago":"Wald, Sebastian. “Atoms in a Propagating-Wave Cavity for Squeezed Mach-Zehnder Atom Interferometry.” Institute of Science and Technology Austria, 2025. <a href=\"https://doi.org/10.15479/AT-ISTA-20798\">https://doi.org/10.15479/AT-ISTA-20798</a>.","mla":"Wald, Sebastian. <i>Atoms in a Propagating-Wave Cavity for Squeezed Mach-Zehnder Atom Interferometry</i>. Institute of Science and Technology Austria, 2025, doi:<a href=\"https://doi.org/10.15479/AT-ISTA-20798\">10.15479/AT-ISTA-20798</a>.","ista":"Wald S. 2025. Atoms in a propagating-wave cavity for squeezed Mach-Zehnder atom interferometry. Institute of Science and Technology Austria.","short":"S. Wald, Atoms in a Propagating-Wave Cavity for Squeezed Mach-Zehnder Atom Interferometry, Institute of Science and Technology Austria, 2025."},"publication_identifier":{"issn":["2663-337X"],"isbn":["978-3-99078-075-6"]},"publication_status":"published","publisher":"Institute of Science and Technology Austria"}]