We study a hybrid system of coupled cavities, with or without two-level atoms doped inside. By employing a building-block construction facilitated by nonlinear Stark coupling, we identify a manifold of exact many-body eigenstates that remain analytically tractable across arbitrary lattice geometries and atom distributions. We demonstrate that these exact states exhibit a dual physical nature depending on their spectral positioning: when embedded within the chaotic many-body spectrum, they manifest as quantum scars that violate the eigenstate thermalization hypothesis and undergo weak ergodicity breaking; conversely, as ground states within fixed-total-excitation sectors, they exhibit off-diagonal long-range order and form polariton condensates. Furthermore, numerical calculations of local excitation-number fluctuations suggest that negative Stark coupling shifts the Mott-insulator to superfluid transition toward weaker inter-cavity hopping. Our findings provide a versatile framework for engineering both coherent quantum phases and non-thermalizing states in diverse light-matter architectures.
Interactions govern the emergence of collective behaviour in classical and quantum many-body systems. While conservative interactions are well known to generate nonlinear phenomena ranging from self-trapping to pattern formation, it remains largely unexplored whether purely dissipative -- i.e., non-Hermitian -- interac...
K. Peters, Peter Schnorrenberg, D. Ehrmanntraut et al.· 0 citations
We study the dynamics of two‐bosonic condensates of exciton–polaritons confined in coupled elliptical traps. Within the mean field approximation the system is described by a generalized two‐body Schrödinger equation that accounts for the pumping of polaritons to the coupled condensates from two independent exciton rese...
A. V. Kavokin, D. Novokreschenov, S. Kavokina· physica status solidi (b)· 0 citations
Electronic quantum coherence in molecular systems rarely persists beyond tens of femtoseconds at room temperature, especially at the macroscopic scale. Recent experimental work suggests that coupling molecular or material excitation to confined radiation inside an optical cavity leads to enhanced coherence lifetime, ex...
Arkajit Mandal· Physical Chemistry of Semico...· 0 citations
Bound states in the continuum (BICs) enable optical modes with ideally infinite radiative lifetimes despite lying within the radiation continuum. Radiation-matter interaction in periodically patterned planar waveguides embedding two-dimensional (2D) optically active excitations can be described quantum mechanically by...
S. Zanotti, M. Liscidini, Dario Gerace et al.· 0 citations
Recent quantum gas cavity-QED experiments demonstrated simultaneous coupling of photons to single atom transitions as well as correlated pairs of ultracold fermions trapped inside optical cavities. This enables simultaneous control over density ordering and pairing. Using extensive numerical simulations, we show that i...
Sankalp Sharma, F. Mivehvar, H. Ritsch et al.· 0 citations
We investigate the topological and collective radiative properties of a one-dimensional diatomic chain of identical quantum emitters with alternating spacing, coupled to the electromagnetic vacuum. The system realizes an extended, non-Hermitian Su-Schrieffer-Heeger-type model with vacuum-mediated long-range interaction...
Arda Deniz İyican, Ahmet Levent Subaşı, Ö. Çakır· 0 citations
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