We describe a lattice version of the Faddeev Model for knotted solitons. We briefly mention the known results for the original Faddeev Model, including the 3/4-energy growth law and the existence results of Lin and Yang. Then we discuss numerical implementations of the model by Faddeev, Battye and Sutcliffe and Ward, motivating the theoretical study of the Lattice Faddeev Model. In particular, we will focus on how one computes a Hopf number for a nice map from R3 to S2 by sampling at integer lattice points Z3. Alternatively, we discuss how one can use this to assign Hopf numbers to a map from Z3 to S2. We then describe how this technique could be generalized to compute general topological invariants for maps between manifolds, given in terms of differential forms, by sampling at a discrete set of points. We characterize some of the function spaces involved in the Lattice Faddeev Model, and derive some energy estimates. Finally, we apply the techniques of Lin and Yang to the Lattice Faddeev Model, to obtain existence results.
|Commitee:||Hang, Fengbo, Kohn, Robert, Lin, Fanghua, Shatah, Jalal, Yang, Yisong|
|School:||New York University|
|School Location:||United States -- New York|
|Source:||DAI-B 70/12, Dissertation Abstracts International|
|Keywords:||Faddeev model, Hopf number, Lattice field theory, Quantum field theory, Topology, Variational problem|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be