Towards spin squeezed ¹⁷¹Yb atomic clock beyond the standard quantum limit
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2017.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2018
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| Online Access: | http://hdl.handle.net/1721.1/115002 |
| _version_ | 1811084317373235200 |
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| author | Kawasaki, Akio, Ph. D. Massachusetts Institute of Technology |
| author2 | Vladan Vuletić. |
| author_facet | Vladan Vuletić. Kawasaki, Akio, Ph. D. Massachusetts Institute of Technology |
| author_sort | Kawasaki, Akio, Ph. D. Massachusetts Institute of Technology |
| collection | MIT |
| description | Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2017. |
| first_indexed | 2024-09-23T12:48:48Z |
| format | Thesis |
| id | mit-1721.1/115002 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T12:48:48Z |
| publishDate | 2018 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1150022019-04-10T11:19:33Z Towards spin squeezed ¹⁷¹Yb atomic clock beyond the standard quantum limit Kawasaki, Akio, Ph. D. Massachusetts Institute of Technology Vladan Vuletić. Massachusetts Institute of Technology. Department of Physics. Massachusetts Institute of Technology. Department of Physics. Physics. Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2017. This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections. Cataloged from student-submitted PDF version of thesis. Includes bibliographical references (pages 231-243). State-of-the-art atomic clocks have fractional frequency instability of 6 x 10-17 at 1 s averaging time, and are aiming for even higher stability. One of the main factors limiting this stability is the standard quantum limit (SQL) of quantum projection noise, which can be overcome by spin squeezing. We constructed an apparatus to perform spin squeezing on an ytterbium optical lattice clock to demonstrate the enhancement of clock stability by spin squeezing. Using the spin 1/2 system of the ground state Zeeman sublevels of 171Yb, two different methods are utilized to perform a spin squeezing via coupling to 6s6p3P1 excited state. One method is measurement-based squeezing, which gave 2.1 dB of spin squeezing. The latter method, cavity feedback squeezing, achieved 8.6 dB of inferred squeezing. The sequence is designed in such a way that the squeezing procedure is unitary, which is demonstrated by reverting the state to a coherent spin state after squeezing it, and the measurement does not require atom number measurement much more precise than the SQL. The squeezing of ground state is expected to be transferred to the 6s6p3P0 state, which is the excited state of the clock transition. This would be the first observation of an entangled state between a ground state and an electronic excited state, and the resulting spin squeezed atomic clock would be the first optical transition clock enhanced by spin squeezing. by Akio Kawasaki. Ph. D. 2018-04-27T17:54:56Z 2018-04-27T17:54:56Z 2017 2017 Thesis http://hdl.handle.net/1721.1/115002 1031219266 eng MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582 243 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Physics. Kawasaki, Akio, Ph. D. Massachusetts Institute of Technology Towards spin squeezed ¹⁷¹Yb atomic clock beyond the standard quantum limit |
| title | Towards spin squeezed ¹⁷¹Yb atomic clock beyond the standard quantum limit |
| title_full | Towards spin squeezed ¹⁷¹Yb atomic clock beyond the standard quantum limit |
| title_fullStr | Towards spin squeezed ¹⁷¹Yb atomic clock beyond the standard quantum limit |
| title_full_unstemmed | Towards spin squeezed ¹⁷¹Yb atomic clock beyond the standard quantum limit |
| title_short | Towards spin squeezed ¹⁷¹Yb atomic clock beyond the standard quantum limit |
| title_sort | towards spin squeezed ¹⁷¹yb atomic clock beyond the standard quantum limit |
| topic | Physics. |
| url | http://hdl.handle.net/1721.1/115002 |
| work_keys_str_mv | AT kawasakiakiophdmassachusettsinstituteoftechnology towardsspinsqueezed171ybatomicclockbeyondthestandardquantumlimit |