23 citations · 39 across the 4 of their papers we have counts for
3 papers · 1 filter
Anomalous behavior of the energy gap in the one-dimensional quantum XY model
Manaka Okuyama, Yuuki Yamanaka, Hidetoshi Nishimori +1
We re-examine the well-studied one dimensional spin-1/2 model to reveal its nontrivial energy spectrum, in particular the energy gap between the ground state and the first exc…
Anomalous behavior of the energy gap in the one-dimensional quantum XY model
Yuuki Yamanaka, Hidetoshi Nishimori
We show for the one-dimensional quantum model with that the energy gap between the ground and first excited states behaves anomalously as a function of the system size…
Energy gap at first-order quantum phase transitions: An anomalous case
Junichi Tsuda, Yuuki Yamanaka, Hidetoshi Nishimori
We show that the rate of closing of the energy gap between the ground state and the first excited state, as a function of system size, behaves in many qualitatively different ways…