Searching for degeneracies of real Hamiltonians using homotopy classification of loops in
Johansson, Niklas, Sjöqvist, ErikVolume:
71
Language:
english
Journal:
Physical Review A
DOI:
10.1103/physreva.71.012106
Date:
January, 2005
File:
PDF, 74 KB
english, 2005