Quantum Orders and Collective degrees of freedom in Many-body systems

Khare, Rishabh (2016) Quantum Orders and Collective degrees of freedom in Many-body systems. Masters thesis, Indian Institute of Science Education and Research Kolkata.

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The anti-ferromagnetic Lieb-Mattis model is investigated in detail. Symmetry breaking, low-lying excitation spectrum and macroscopic quantity like Berry phase are calculated for this model. Superconductivity is studied with respect to the collective modes of negative U Hubbard model and the BCS superconductor. The Integer Quantum Hall is looked into by various ways such as by using the center of mass and orbital center coordinates. The importance of domain wall in a Quantum Hall system is stressed.These systems are particularly chosen as they are prototypical/ archetypal fermionic and spin quantum condensed matter systems. iii

Item Type: Thesis (Masters)
Additional Information: Supervisor: Dr. Siddhartha Lal
Uncontrolled Keywords: Antiferromagnetism; Berry Phase; Condensed Matter Systems; Hubbard Model; Integer Quantum Hall; Lieb-Mattis model; Low-lying Excitation Spectrum; Macroscopic Quantity; Quantum Hall Effect; Superconductivity; Symmetry Breaking
Subjects: Q Science > QC Physics
Divisions: Department of Physical Sciences
Depositing User: IISER Kolkata Librarian
Date Deposited: 09 Aug 2016 06:03
Last Modified: 09 Aug 2016 06:03
URI: http://eprints.iiserkol.ac.in/id/eprint/381

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