2026/01/31 by Anonymous, Fabrizio Ramírez, David Villaseñor +2
Computer Science · Engineering · Physics and Astronomy · #Nonlinear Optical Materials Studies #Quantum Information and Cryptography #Quantum optics and atomic interactions #cond-mat.stat-mech #quant-ph
paper · pdf · doi:10.1103/syq9-z93n
openalex publication_date 2026/06/25 · openalex created_date 2026/06/26 · openalex updated_date 2026/07/31
Two-photon light-matter interactions exhibit distinctive features such as spectral collapse. The two-photon Dicke model has been reported to exhibit a superradiant phase which could be useful in quantum applications. Here we show that this superradiant phase is not a genuine thermodynamic phase but a finite-size effect. Combining analytical and numerical analyses, we demonstrate that the superradiant region shrinks with increasing system size and disappears in the thermodynamic limit, while spectral collapse remains. Our results clarify the nature of superradiant conditions in two-photon systems and constrain its realization in quantum platforms.