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Reference Section Method for Mixed State Geometric Phase in Nonunitary Evolution |
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| Authors: | DU Guang-Le LI Tian-Jun |
| Institution: | State Key Laboratory of Theoretical Physics and Kavli Institute for Theoretical Physics China (KITPC), Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China |
| Abstract: | We propose the reference section method to obtain a geometric phase for the mixed states in nonunitary evolution. The reference connection on density operator space is defined. That the parallel transport method and reference section method are essentially two aspects of in phase concept is pointed out. |
| Keywords: | geometric phase reference section mixed states nonunitary evolution |
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