General phase diagram features of superradiant phase transitions

• URL: http://arxiv.org/abs/2503.09982v1
• Date: Thu, 13 Mar 2025 02:47:40 GMT
• Title: General phase diagram features of superradiant phase transitions
• Abstract summary: We find a general phase diagram feature that the origin is in normal phase (NP) and SPT happens only once along the radial direction of a chosen coupling parameter vector.<n>We illustrate it with specific models and find SPT can be achieved in strong coupling regime by means of multimode collective behavior.
• Score: 11.0207289483055
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Various light-matter interactions lead to diverse phase diagram structures in superradiant phase transition (SPT) studies. Such systems consist of multiqubit and multimode with anisotropic couplings, one-photon and two-photon interactions, Stark shifts, inter-cavity hoppings, qubit-qubit interactions and so on. We find a general phase diagram feature that the origin is in normal phase (NP) and SPT happens only once along the radial direction of a chosen coupling parameter vector with the mean-field method at finite temperature. We can calculate the the phase boundary and SPT properties by a concise method. We illustrate it with specific models and find SPT can be achieved in strong coupling regime by means of multimode collective behavior.

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