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DTSTART:20150329T010000
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DTSTART:20151025T010000
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DTSTART;TZID=Europe/Rome:20150422T143000
DTEND;TZID=Europe/Rome:20150422T170000
DTSTAMP:20260512T022307
CREATED:20171026T122350Z
LAST-MODIFIED:20171026T122350Z
UID:6894-1429713000-1429722000@w3.lnf.infn.it
SUMMARY:Low Dimensional Lattice Spin Models: Magnetization Plateau\, Thermal Entanglement & Partition Function Zeros
DESCRIPTION:Quantum phase transitions play a key role in the understanding the phenomena of many-body systems\, especially in anti-ferromagnetic magnetic plateaus. By means of variation mean-field-like treatment based on the Gibbs–Bogoliubov inequality\, it is presented the frustrated magnetization plateau and thermal concurrence properties in spin-1/2 Ising–Heisenberg models on a triangulated Kagom´e lattice and a diamond chain.  Using the transfer matrix method\, an exact solution for the magnetization plateau and thermal entanglement of Ising-XYZ\, Blume-Emery-Griffiths and Hubbard-Ising models on a diamond chain can be obtained. Partition function zeros of the spin-1/2 and spin-1 Ising-Heisenberg models on a diamond chain have been calculated using the transfer matrix method. The existence usual and triple Yang-Lee edge singularity exponents are shown.
URL:/event/low-dimensional-lattice-spin-models-magnetization-plateau-thermal-entanglement-partition-function-zeros/
LOCATION:Aula Seminari\, Via Enrico Fermi\, 40\, Frascati\, Roma\, 00044\, Italia
CATEGORIES:Seminari teorici
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