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August 9
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Aug. 9 - 7p
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14:00 - 14:30
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14:30 - 15:00
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15:00 - 15:30
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| Quantum Phase Transition between Two Ordered Phases with Unrelated Symmetries |
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Kenji Harada |
| We show results of quantum Monte Carlo simulations for the quasi-one dimensional S=1 biquadratic Heisenberg antiferromagnet. When the spatial anisotropy is varied, a direct phase transition from the spontaneous dimerized phase to the Neel ordered phase is observed. If it is a continuous phase transition, it shows an unconventional critical phenomena that may separate two phases of which the symmetry group of the lower-symmetry phase is not a sub-group of the other. |