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https://scholarbank.nus.edu.sg/handle/10635/230678
DC Field | Value | |
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dc.title | EXOTIC PHASES IN A SPIN-1 BOSONIC FLUX SYSTEM | |
dc.contributor.author | SIT HAN YU | |
dc.date.accessioned | 2022-08-31T18:00:24Z | |
dc.date.available | 2022-08-31T18:00:24Z | |
dc.date.issued | 2022-05-12 | |
dc.identifier.citation | SIT HAN YU (2022-05-12). EXOTIC PHASES IN A SPIN-1 BOSONIC FLUX SYSTEM. ScholarBank@NUS Repository. | |
dc.identifier.uri | https://scholarbank.nus.edu.sg/handle/10635/230678 | |
dc.description.abstract | We study, using the optimisation of matrix product states, the ground state properties of an interacting spin-1 hardcore boson model on a ladder in a transverse magnetic field at zero temperature. At unit filling in the strong-interacting regime, we observe a Mott insulator phase characterised by a charge gap and a periodic exponential decay of the Green’s functions. However, surprisingly, the connected density-density correlation functions decay with a power law and neutral excitations are gapless. When the hopping strength is sufficiently large or at non-commensurate filling, the system transitions to a superfluid phase characterised by the absence of a charge gap and a power-law decay of the Green’s functions. Due to the magnetic field, bond currents, which quantify the rate of change of the average number of particles on a given site, are observed and can characterise the phases. Notably, bond current loops form in the superfluid phase. | |
dc.language.iso | en | |
dc.subject | interacting spin-1 bosons, lattice in magnetic field, Mott insulator-superfluid phase transition, matrix product states optimisation | |
dc.type | Thesis | |
dc.contributor.department | PHYSICS | |
dc.contributor.supervisor | Ghassan Georges Batrouni | |
dc.contributor.supervisor | Berthold-Georg Englert | |
dc.description.degree | Master's | |
dc.description.degreeconferred | MASTER OF SCIENCE (RSH-FOS) | |
dc.identifier.orcid | 0000-0001-9056-9660 | |
Appears in Collections: | Master's Theses (Open) |
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File | Description | Size | Format | Access Settings | Version | |
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SitHY.pdf | 4.51 MB | Adobe PDF | OPEN | None | View/Download |
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