• 題目：

  Fermion Condensates
  
  

• 講師： D．M．Brink
  　　 （Oxford 大教授、元ヨーロッパ理論物理学研究所副所長）
  
  
• 日時・場所： 11/6(木) 16:00-17:00
  大学院講義室 2-2-11
  
  
• 要旨：
  A nucleus is a condensate of protons and neutrons. Low density condensates of atoms in magnetic or laser traps have been produced and investigated during recent years. The lecture will discuss similarities and differences in the physics of nuclei and of condensates of fermionic atoms.
  

  According to traditional theories nuclei are composed of neutrons and protons, while atoms are composed of nuclei
  and electrons. Protons, neutrons and electrons all have spin s=1/2 and obey Fermi statistics. There is a rule which
  states that clusters of fermions satisfy Bose or Fermi statistics according to whether the number fermions in each
  cluster is even or odd. This rule and the conditions for its validity will be discussed in the first part of the lecture.
  

  The second part of the lecture will be devoted to the structure of nuclei. The shell model and mean field
  theories are two similar but subtly different approaches to nuclear structure theory. There are various questions
  which need to be answered. Is there a theory which unifies these two approaches? Will a theory be developed which
  takes into account the quark structure of nucleons? Do more complicated structures like alpha particles play a role in
  nuclear structure?
  

  Recent work on condensates of fermions in magnetic or laser traps will be reviewed in the third part of the
  lecture. What kind of measurements can be made on these condensates? Can the condensates become super conducting?
  Can our knowledge of nuclear structure help with the understanding of these condensates?

  
  　
  
  
• 連絡先： 加藤幾芳(2684)
  

物理コロキウム世話人:
　山本昌司 ( 4月-9月) (Tel: 2681; E-mail: yamamoto@phys.sci.hokudai.ac.jp)
　中山隆一 （10月-3月）(Tel: 2696; E-mail: nakayama@particle.sci.hokudai.ac.jp)