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dc.contributor.advisorVladan Vuletić.en_US
dc.contributor.authorHu, Jiazhong, Ph. D. Massachusetts Institute of Technologyen_US
dc.contributor.otherMassachusetts Institute of Technology. Department of Physics.en_US
dc.date.accessioned2018-04-27T18:09:57Z
dc.date.available2018-04-27T18:09:57Z
dc.date.copyright2017en_US
dc.date.issued2017en_US
dc.identifier.urihttp://hdl.handle.net/1721.1/115012
dc.descriptionThesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2017.en_US
dc.descriptionCataloged from PDF version of thesis.en_US
dc.descriptionIncludes bibliographical references (pages 137-149).en_US
dc.description.abstractIn this thesis, we investigate several methods to generate and probe the quantum correlations in ultracold gases using light. A high-finesse optical cavity is used to enhance the atom-light interaction and we can produce a variety of entangled states which can overcome the standard quantum limit. The quantum correlations are generated by sending very weak light into the cavity which contains many neutral atoms. We control the properties of the incoming photon, such as the polarization and/or the frequency spectrum, to obtain the final atomic states as desired. The photon transmitted through the cavity interacts with the atomic ensemble and becomes entangled with the atomic state. The amount of entanglement strength is usually small but non-zero. Placing a detector after the cavity, the tiny amount of entanglement will be dramatically amplified once a photon is heralded in the detector. Using this method, we demonstrated the first observation of the negative Wigner function in the many-body system, and largely extended the record of the maximum number of atoms entangled. Other than engineering entangled many-body system, we have also worked on reaching the quantum degenerate regime for the atomic gas, in order to enhance quantum correlations in future experiments. Laser cooling all the way to Bose-Einstein condensation of an alkali atom is experimentally realized for the first time. We demonstrate a special technique suppressing the binary atomic loss at high atomic density. By transferring the atoms between two different optical traps, the atomic cloud is compressed and the density is increased. Combining these with the Raman sideband cooling method, we achieve the phase space density over 1, and observe the bimodal velocity distribution characteristic of a Bose-Einstein condensate.en_US
dc.description.statementofresponsibilityby Jiazhong Hu.en_US
dc.format.extent149 pagesen_US
dc.language.isoengen_US
dc.publisherMassachusetts Institute of Technologyen_US
dc.rightsMIT 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.en_US
dc.rights.urihttp://dspace.mit.edu/handle/1721.1/7582en_US
dc.subjectPhysics.en_US
dc.titleLight-induced many-body correlations in ultracold gasesen_US
dc.typeThesisen_US
dc.description.degreePh. D.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physics.en_US
dc.identifier.oclc1029767180en_US


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