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Theoretical models have also been developed to study the physics of phase transitions , such as the Ginzburg–Landau theory , critical exponents and the use of mathematical methods of quantum field theory and the renormalization group .
 Ginzburg–Landau
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ginzburg–Landau