Chiral crossover characterized by Mott transition at finite temperature

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: LETTERS
• 页码范围: 18-22
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1137/abcfad

摘要

We discuss the proper definition for the chiral crossover at finite temperature,based on Goldstone's the-orem.Different from the commonly used maximum change in chiral condensate,we propose defining the crossover temperature using the Mott transition of pseudo-Goldstone bosons,which,by definition,guarantees Goldstone's the-orem.We analytically and numerically demonstrate this property in the frame of a Pauli-Villars regularized NJL model.In an external magnetic field,we find that the Mott transition temperature shows an inverse magnetic catalysis effect.