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SUMMARY:"Quantum Phase Transitions and Solving the Naturalness Problem in 
 Generalized Field Theories."
DTSTART;VALUE=DATE-TIME:20230725T063000Z
DTEND;VALUE=DATE-TIME:20230725T073000Z
DTSTAMP;VALUE=DATE-TIME:20260910T171453Z
UID:indico-event-136@indico.nitep.omu.ac.jp
DESCRIPTION:Informal seminar\n日時：7月25日（火）15:30〜\n場所
 ：F216 (第8講義室)\nSpeaker: Hikaru KAWAI（National Taiwan Universit
 y)\nTitle: "Quantum Phase Transitions and Solving the Naturalness Problem 
 in Generalized Field Theories."\n\nAbstract: In ordinary statistical mecha
 nics\, the extensive parameters (such as total volume and total energy) ar
 e more fundamental than the intensive parameters (such as temperature and 
 pressure) in the sense that the latter are determined a posteriori by the 
 former in the large volume limit. Furthermore\, in a finite region of the 
 extensive parameter space\, the corresponding intensive parameters are aut
 omatically fixed to the first-order phase transition point.\nAnalogously\,
  in conventional quantum field theory\, coupling constants (including mas
 ses) in the path integral correspond to intensive parameters in the partit
 ion function of the canonical formulation. Therefore\, it is natural to ex
 pect that in a more fundamental formulation of quantum field theory\, coup
 ling constants are dynamically fixed a posteriori in the large-volume limi
 t\, just as the intensive parameter in statistical mechanics.\nIn generali
 zed field theories\, we argue that an automatic fine-tuning is realized in
  which the coupling constant is fixed at the quantum phase transition poin
 t at zero temperature. This occurs even if the transition is of higher ord
 er due to the Lorentzian nature of the path integral.\nThis can be the bas
 is for solving the naturalness problem.\n\nhttps://indico.nitep.osaka-cu.a
 c.jp/event/136/
LOCATION:
URL:https://indico.nitep.osaka-cu.ac.jp/event/136/
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