2 papers
quant-ph2026
Geometric phases of reduced states in the transverse-field Ising chain
Chiragkumar R. Vasani, Erik Sjöqvist
Geometric phases have been extensively investigated in a wide range of quantum systems, often revealing deep connections to the underlying topology of many-body states. In this wor…
quant-ph2004
Comment on "Geometric phases for mixed states during cyclic evolutions"
Erik Sjöqvist
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.