Figure 8 | Scientific Reports

Figure 8

From: Enhancing quantum phase transitions in the critical point of Extended TC-Dicke model via Stark effect

Figure 8

The contour plot of the scaled energy E(α, θ) for χ = 0 (upper panels) and χ = 1 (lower panels). The black and orange regions indicate the regions with low and high energies, respectively. From left to right: for γ1 = 0.0 and γ2 = 0.0, γ1 = 1.0 and γ2 = 2.0, γ1 = 2.0 and γ2 = 4.0 and γ1 = 4.0 and γ2 = 5.0. Other parameters are unity.

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