[{"doi_confirm":"1","doi":"10.15479/AT-ISTA-20798","date_published":"2025-12-11T00:00:00Z","alternative_title":["ISTA Thesis"],"_id":"20798","year":"2025","status":"public","publication_identifier":{"isbn":["978-3-99078-075-6"],"issn":["2663-337X"]},"publisher":"Institute of Science and Technology Austria","publication_status":"published","citation":{"ieee":"S. Wald, “Atoms in a propagating-wave cavity for squeezed Mach-Zehnder atom interferometry,” Institute of Science and Technology Austria, 2025.","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>.","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>.","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>","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>","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."},"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"},"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"}],"corr_author":"1","language":[{"iso":"eng"}],"degree_awarded":"PhD","article_processing_charge":"No","department":[{"_id":"GradSch"},{"_id":"OnHo"}],"oa":1,"OA_embargo":"6","ddc":["530"],"month":"12","fulldoi":"https://doi.org/10.15479/AT-ISTA-20798","date_updated":"2026-07-24T08:07:28Z","file_date_updated":"2026-06-15T22:30:03Z","date_created":"2025-12-11T11:48:11Z","OA_place":"publisher","has_accepted_license":"1","title":"Atoms in a propagating-wave cavity for squeezed Mach-Zehnder atom interferometry","keyword":["entanglement-enhanced atom interferometry","cavity QED","spin-squeezing","dipole trap","quantum optics"],"file":[{"creator":"swald","embargo":"2026-06-15","relation":"main_file","access_level":"open_access","date_updated":"2026-06-15T22:30:03Z","file_name":"2025_Wald_Sebastian_Thesis.pdf","file_size":47536855,"date_created":"2025-12-12T11:53:42Z","content_type":"application/pdf","checksum":"1be72faf529a5e8a2d03cb3d5f808b77","file_id":"20809"},{"file_size":40127601,"file_name":"2025_Wald_Sebastian_Thesis.zip","date_updated":"2026-06-15T22:30:03Z","access_level":"closed","relation":"source_file","creator":"swald","file_id":"20810","content_type":"application/x-zip-compressed","embargo_to":"open_access","checksum":"8c3a1904dceb4bcd04bc9f14b2594bab","date_created":"2025-12-12T11:54:55Z"}],"das_tickbox":"1","supervisor":[{"orcid":"0000-0002-2031-204X","full_name":"Hosten, Onur","id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","first_name":"Onur","last_name":"Hosten"}],"type":"dissertation","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","related_material":{"record":[{"id":"14759","status":"public","relation":"part_of_dissertation"}]},"day":"11","author":[{"last_name":"Wald","first_name":"Sebastian","orcid":"0000-0002-5869-1604","full_name":"Wald, Sebastian","id":"133F200A-B015-11E9-AD41-0EDAE5697425"}],"page":"152"},{"file":[{"date_created":"2023-03-23T10:03:16Z","file_id":"12743","content_type":"application/zip","checksum":"fd9a28620a81a82991fb70f4fd6591d9","access_level":"open_access","relation":"main_file","creator":"lbecker","date_updated":"2023-03-24T09:34:20Z","file_size":87018103,"file_name":"Research_Data.zip"},{"file_id":"12755","checksum":"30ebdfb600af118fcf8518b6efe0b7e9","content_type":"text/plain","date_created":"2023-03-24T07:13:55Z","date_updated":"2023-03-24T09:42:03Z","file_size":747,"file_name":"README.txt","access_level":"open_access","relation":"main_file","creator":"dernst"}],"keyword":["aromatic side chains","isotopic labeling","protein dynamics","ring flips","spin relaxation"],"oa":1,"department":[{"_id":"GradSch"},{"_id":"PaSc"}],"article_processing_charge":"No","related_material":{"record":[{"status":"public","id":"12675","relation":"used_in_publication"}]},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","type":"research_data","day":"23","author":[{"last_name":"Becker","first_name":"Lea Marie","id":"36336939-eb97-11eb-a6c2-c83f1214ca79","orcid":"0000-0002-6401-5151","full_name":"Becker, Lea Marie"},{"full_name":"Schanda, Paul","orcid":"0000-0002-9350-7606","id":"7B541462-FAF6-11E9-A490-E8DFE5697425","first_name":"Paul","last_name":"Schanda"}],"ddc":["572"],"doi":"10.15479/AT:ISTA:12497","month":"03","status":"public","year":"2023","file_date_updated":"2023-03-24T09:42:03Z","_id":"12497","date_published":"2023-03-23T00:00:00Z","fulldoi":"https://doi.org/10.15479/AT:ISTA:12497","date_updated":"2024-10-21T06:01:38Z","citation":{"apa":"Becker, L. M., &#38; Schanda, P. (2023). Research data to: The rigid core and flexible surface of amyloid fibrils probed by magic-angle-spinning NMR spectroscopy of aromatic residues. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT:ISTA:12497\">https://doi.org/10.15479/AT:ISTA:12497</a>","ama":"Becker LM, Schanda P. Research data to: The rigid core and flexible surface of amyloid fibrils probed by magic-angle-spinning NMR spectroscopy of aromatic residues. 2023. doi:<a href=\"https://doi.org/10.15479/AT:ISTA:12497\">10.15479/AT:ISTA:12497</a>","ieee":"L. M. Becker and P. Schanda, “Research data to: The rigid core and flexible surface of amyloid fibrils probed by magic-angle-spinning NMR spectroscopy of aromatic residues.” Institute of Science and Technology Austria, 2023.","chicago":"Becker, Lea Marie, and Paul Schanda. “Research Data to: The Rigid Core and Flexible Surface of Amyloid Fibrils Probed by Magic-Angle-Spinning NMR Spectroscopy of Aromatic Residues.” Institute of Science and Technology Austria, 2023. <a href=\"https://doi.org/10.15479/AT:ISTA:12497\">https://doi.org/10.15479/AT:ISTA:12497</a>.","mla":"Becker, Lea Marie, and Paul Schanda. <i>Research Data to: The Rigid Core and Flexible Surface of Amyloid Fibrils Probed by Magic-Angle-Spinning NMR Spectroscopy of Aromatic Residues</i>. Institute of Science and Technology Austria, 2023, doi:<a href=\"https://doi.org/10.15479/AT:ISTA:12497\">10.15479/AT:ISTA:12497</a>.","ista":"Becker LM, Schanda P. 2023. Research data to: The rigid core and flexible surface of amyloid fibrils probed by magic-angle-spinning NMR spectroscopy of aromatic residues, Institute of Science and Technology Austria, <a href=\"https://doi.org/10.15479/AT:ISTA:12497\">10.15479/AT:ISTA:12497</a>.","short":"L.M. Becker, P. Schanda, (2023)."},"publisher":"Institute of Science and Technology Austria","date_created":"2023-02-03T08:08:02Z","abstract":[{"text":"Aromatic side chains are important reporters of the plasticity of proteins, and often form important contacts in protein–protein interactions. We studied aromatic residues in the two structurally homologous cross-β amyloid fibrils HET-s, and  HELLF by employing a specific isotope-labeling approach and magic-angle-spinning NMR. The dynamic behavior of the aromatic residues Phe and Tyr indicates that the hydrophobic amyloid core is rigid, without any sign of \"breathing motions\" over hundreds of milliseconds at least. Aromatic residues exposed at the fibril surface have a rigid ring axis but undergo ring flips on a variety of time scales from nanoseconds to microseconds. Our approach provides direct insight into hydrophobic-core motions, enabling a better evaluation of the conformational heterogeneity generated from an NMR structural ensemble of such amyloid cross-β architecture.","lang":"eng"}],"contributor":[{"last_name":"Berbon","first_name":"Mélanie","contributor_type":"researcher"},{"contributor_type":"researcher","last_name":"Vallet","first_name":"Alicia"},{"contributor_type":"researcher","last_name":"Grelard","first_name":"Axelle"},{"first_name":"Estelle","last_name":"Morvan","contributor_type":"researcher"},{"contributor_type":"researcher","last_name":"Bardiaux","first_name":"Benjamin"},{"contributor_type":"researcher","last_name":"Lichtenecker","first_name":"Roman"},{"contributor_type":"researcher","last_name":"Ernst","first_name":"Matthias"},{"contributor_type":"researcher","first_name":"Antoine","last_name":"Loquet"},{"id":"7B541462-FAF6-11E9-A490-E8DFE5697425","orcid":"0000-0002-9350-7606","first_name":"Paul","last_name":"Schanda","contributor_type":"contact_person"},{"orcid":"0000-0002-6401-5151","id":"36336939-eb97-11eb-a6c2-c83f1214ca79","contributor_type":"researcher","last_name":"Becker","first_name":"Lea Marie"}],"title":"Research data to: The rigid core and flexible surface of amyloid fibrils probed by magic-angle-spinning NMR spectroscopy of aromatic residues","corr_author":"1","has_accepted_license":"1","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"},"oa_version":"Published Version"}]