Fig. 3: Order parameter crossover and entanglement signatures of QPT at thermodynamic equilibrium. | Communications Physics

Fig. 3: Order parameter crossover and entanglement signatures of QPT at thermodynamic equilibrium.

From: Environment induced dynamical quantum phase transitions in two-qubit Rabi model

Fig. 3

Qubits' squared magnetization M2 (a), qubits' energy 〈HΔ〉/Δ (b), von Neumann entropy Sq (c) and concurrence Cq (d) as functions of g/Δ for J = 0, computed through WLMC and DMRG. For the WLMC method the calculations are made for βΔ ∈ [100, 1000]. In panel (c), the dashed line represents the maximum von Neumann entropy for a single qubit.

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