title: Manipulating quantum entanglement with atomic ensembles and with atoms in optical superlattices : towards scalable quantum information processing
creator: Xu, Xiao-Fan
subject: ddc-530
subject: 530 Physics
description: Quantum information science possesses promising potentialities for developing new secure and efficient ways to transfer and process information. Prodigious efforts have been and are being devoted, however, a scalable architecture is still a considerable challenge. Among the potential candidates, photons are assumed to be good carriers, and neutral atoms good hosts. In this thesis, photon-matter entanglement sources, which exploit the advantages of both, are employed to demonstrate a teleportation between two atomic-ensemble quantum memory nodes and an efficient entanglement swapping, which are essential for scalable quantum networks. Later, the entanglement source is further developed, and an active feedforward one-way quantum computation is presented  with stationary quantum memories, which are necessary for scalable quantum computers. To fulfill another feature of scalability, the ease of integration, ultracold atoms in  two-dimensional optical superlattices are studied and an experiment is designed to generate four-qubit entangled states. With the help of the photon-matter entanglement  sources, serving as quantum memories and nodes of quantum networks, realization of large-scale quantum networks is foreseeable. Meanwhile, by applying controllable interactions, large entangled states could be generated in optical superlattices, which might help to construct quantum processors that outperform the classical counterparts.
date: 2014
type: Dissertation
type: info:eu-repo/semantics/doctoralThesis
type: NonPeerReviewed
format: application/pdf
identifier: https://archiv.ub.uni-heidelberg.de/volltextserverhttps://archiv.ub.uni-heidelberg.de/volltextserver/17200/1/PhD%20Thesis%202014%20Heidelberg%20Xiao-Fan%20Xu.pdf
identifier: DOI:10.11588/heidok.00017200
identifier: urn:nbn:de:bsz:16-heidok-172003
identifier:   Xu, Xiao-Fan  (2014) Manipulating quantum entanglement with atomic ensembles and with atoms in optical superlattices : towards scalable quantum information processing.  [Dissertation]     
relation: https://archiv.ub.uni-heidelberg.de/volltextserver/17200/
rights: info:eu-repo/semantics/openAccess
rights: http://archiv.ub.uni-heidelberg.de/volltextserver/help/license_urhg.html
language: eng