Speaker
Description
The superradiant phase transition takes place when an ensemble of ultracold atoms collectively coupled to a single-mode cavity is transversally driven by a classical coherent pump. Above a critical drive strength, the system transitions from a normal to a superradiant phase, building up a non-zero cavity field while the atoms form a crystalline pattern. In this work, we extend this standard setup by promoting the classical transversal pump to a quantum field carrying squeezed fluctuations. We derive an effective trilinear Hamiltonian coupling the cavity, the ensemble of atoms, and the squeezed pump. Building on this model, we explore routes toward answering two key questions: whether squeezing can be transferred from the pump into the cavity and atomic subsystems, and if the squeezing parameters affect the superradiant phase transition specifically, whether they shift the classical critical coupling threshold.