Abstract/Details

Novel superfluid states in bosonic systems


2009 2009

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Abstract (summary)

In my dissertation, I will discuss unconventional superfluid states of various bosonic systems and present benchmark calculations for phase diagrams. The method of study is based on quantum Monte Carlo simulations by the Worm algorithm. The two qualitatively different systems to be discussed in the thesis are: (i) superfluidity of lower dimensional objects, i.e dislocations and defects, embedded in solid structures both in optical lattices and in realistic systems such as 4He. (ii) the two-component Bose-Hubbard model. Besides the interesting phases and phase diagrams that they exhibit, bosonic optical lattice systems are also interesting for studies of quantum magnetism where under certain conditions they can be mapped onto various spin Hamiltonians. On the other hand, superfluid dislocations in 4He is an important and interesting subject for it’s relevance to supersolid behavior observed in solid 4 He. I will also present technical details of the path integral Monte Carlo and the Worm algorithm and generalization of the algorithm to the two-component bosonic systems.

Indexing (details)


Subject
Condensed matter physics
Classification
0611: Condensed matter physics
Identifier / keyword
Pure sciences, Bose-Einstein condensates, Optical lattices, Quantum Monte Carlo, Superfluidity, Supersolidity, Two-component bosons
Title
Novel superfluid states in bosonic systems
Author
Soyler, Sebnem Gunes
Number of pages
110
Publication year
2009
Degree date
2009
School code
0118
Source
DAI-B 70/12, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9781109500981
Advisor
Prokof'ev, Nikolay V.
Committee member
Anderson, Neal G.; Machta, Jonathan L.; Svistunov, Boris V.
University/institution
University of Massachusetts Amherst
Department
Physics
University location
United States -- Massachusetts
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3380024
ProQuest document ID
304928069
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304928069
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