Kinematic Approach to the Mixed State Geometric Phase in Nonunitary Evolution

• DOI: 10.1103/physrevlett.93.080405
• Publication Date: 2004-08-21T02:10:32Z
• Authors: D. M. Tong; E. Sjöqvist; L. C. Kwek; C. H. Oh
• Keywords: Time evolution

A kinematic approach to the geometric phase for mixed quantal states in nonunitary evolution is proposed. This manifestly gauge invariant and can be experimentally tested interferometry. It leads well-known results when unitary.