Fig. 5: Singular behavior of the higher-order correlation and energy gap.
From: Single-photon pulse induced giant response in Nā>ā100 qubit system
a The higher-order correlation Cxxyy diverges at the phase transition point Jxā=āJyā=ā0.7Ļµ. b The energy gap vanishes at the phase transition point. The subgraphs show the same curves in the linear coordinates. Both curves are symmetric on the two sides of the phase transition. The solid black lines are the algebraic fittings. The qubit number is set as Nā=ā1000.
