Comment on "Geometric phases for mixed states during cyclic evolutions"
arXiv:quant-ph/0404174 · doi:10.1088/0305-4470/37/29/N01
Abstract
It is shown that a recently suggested concept of mixed state geometric phase in cyclic evolutions [2004 {\it J. Phys. A} {\bf 37} 3699] is gauge dependent.
Comment to the paper L.-B. Fu and J.-L. Chen, J. Phys. A 37, 3699 (2004); small changes; journal reference added