Dissipative dynamics and superradiant countinuous time crystal in a Rydberg-dressed Dicke system

• URL: http://arxiv.org/abs/2604.18119v1
• Date: Mon, 20 Apr 2026 11:37:39 GMT
• Title: Dissipative dynamics and superradiant countinuous time crystal in a Rydberg-dressed Dicke system
• Abstract summary: We explore an open Dicke model including Rydberg-dressed interactions in a driven-dissipative cavity.<n>We find that Rydberg-dressed interactions generate an additional critical coupling, which alters the stability of fixed points.<n>By bridging driven-dissipative quantum cavity and interacting atomic systems, our Rydberg-dressed Dicke system offers measurable signatures from the cavity emission photons.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The interplay between many-body interactions and controlled dissipation provides a rich framework for exploring nonequilibrium quantum phases. In this work, we explore an open Dicke model including Rydberg-dressed interactions in a driven-dissipative cavity and unveil its unique nonequilibrium dynamics therein. We find that Rydberg-dressed interactions generate an additional critical coupling, which alters the stability of fixed points and hence determines fruitful dynamical phase transitions. Beyond the mean-field limit, we demonstrate that our system supports a superradiant continuous time crystal (CTC) phase, proving CTC can exist in an interacting spin-1/2 system. By bridging driven-dissipative quantum cavity and interacting atomic systems, our Rydberg-dressed Dicke system offers measurable signatures from the cavity emission photons, making it experimentally feasible as a versatile platform for exploring dynamical phase transitions and macroscopic temporal order in open quantum matter.

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