Ground-state angular momentum, spectral asymmetry, and topology in chiral superfluids and superconductors
Ground-state angular momentum, spectral asymmetry, and topology in chiral superfluids and superconductors
Recently it was discovered that the ground state orbital angular momentum in two-dimensional chiral superfluids with pairing symmetry $(p_x+ip_y)^\nu$ depends on the winding number $\nu$ in a striking manner. The ground state value for the $\nu=1$ case is $L_z=\hbar N/2$ as expected by counting the Cooper pairs, while a dramatic …