Geometric phases for mixed states in interferometry.
- We provide a physical prescription based on interferometry for introducing the total phase of a mixed state undergoing unitary evolution, which has been an elusive concept in the past. We define the parallel transport condition that provides a connection form for obtaining the geometric phase for mixed states. The expression for the geometric phase for mixed state reduces to well known formulas in the pure state case when a system undergoes noncyclic and unitary quantum evolution.
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- American Inst of Physics Publisher's website
- Physical Review Letters
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- Two column, 4 pages, Latex file, No figures, Few changes
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