Quantum phase transitions in a Dicke trimer with both photon and atom hoppings

Abstract

We investigate superradiant quantum phase transitions in a Dicke trimer model consisting of two types of hoppings, i.e., photon hoppings and atom hoppings. In the superradiant regime, the system can exist in two distinct phases: normal and frustrated superradiant phases, which are governed by both types of hoppings. Particularly, the interplay between these hoppings gives rise to interesting effects, such as triggering superradiance with much lower coupling strengths when both hoppings exhibit the same tendency. In contrast, with opposite tendencies, the competition between hoppings leads to a first-order phase transition between two different superradiant phases with translational symmetry broken. These findings enable the system to undergo a sequence of transitions across three phases by changing the coupling strength. Our work provides deep insights into competing interactions and quantum phase transitions in multi-cavity systems with geometric structures.

9 pages, 6 figures

References in corpus (17)

• Many-Body Physics with Ultracold Gases
• Circuit Quantum Electrodynamics
• Coupling Superconducting Qubits via a Cavity Bus
• Quantum phase transitions of light
• Phonon-mediated quantum state transfer and remote qubit entanglement
• Geometric Frustration in Buckled Colloidal Monolayers
• On the phase transition of light in cavity QED lattices
• Quantum phase transition in the Dicke model with critical and non-critical entanglement
• Ice Rule and Emergent Frustration in Particle Ice and Beyond
• Quantum tricriticality of chiral-coherent phase in quantum Rabi triangle
• Waveguide Bandgap Engineering with an Array of Superconducting Qubits
• The non-reciprocal Dicke model
• High Coherence in a Tileable 3D Integrated Superconducting Circuit Architecture
• Understanding the quantum Rabi ring using analogies to quantum magnetism
• Quantum Phase Transitions in Optomechanical Systems
• Frustrated Superradiant Phase Transition
• Anomalous criticality with bounded fluctuations and long-range frustration induced by broken time-reversal symmetry