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Departamento de Gravitación y Teoría de CamposSeminarios 2014 |
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Instituto de Ciencias Nucleares, UNAM |
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Departamento de Gravitación y Teoría de CamposSeminarios 2014 |
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Instituto de Ciencias Nucleares, UNAM |
Jueves 21 de agosto, a las 17:00 hrs en la Sala de Seminarios A2.25, 2. piso del ICN
Wolfgang Bietenholz (ICN /UNAM)
Interpreting topologically restricted measurements
| We address models with topological sectors, and difficulties with their Monte Carlo simulation. In particular we are concerned with the situation where a simulation has an extremely long auto-correlation time with respect to the topological charge. Then reliable numerical measurements are feasible only within individual topological sectors. The challenge is to assemble such restricted measurements to obtain a systematic approximation for the full-fledged result, which would correspond to the correct sampling over the entire set of configurations. Under certain conditions this is indeed possible, and it provides in addition an estimate for the topological susceptibility chi_t. We test this scenario, and also an alternative approach to measure chi_t from the topological charge density correlation in a fixed sector. |
