| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2011: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Research Abstract |
We studied quantum chromodynamics (QCD) at high temperature and density by numerical simulations. Treating the quark masses as parameters of the system as well as the temperature and chemical potential, we proposed a method to investigate the nature of phase transitions by calculating probability distribution functions. First, we tested usability of the method studying the heavy quark region at finite density and actually found the critical surface which separates the crossover and first order transition regions in the heavy quark region. Second, we performed simulations with 2-flavor dynamical quarks. The results suggest that the crossover transition at low density will change first order at high density, which have been predicted by phenomenological studies. Furthermore, we did various studies related to the QCD phase transition such as the scaling behavior of the chiral phase transition at low density.
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