Superradiant phase transition induced by the indirect Rabi interaction

Abstract

We theoretically study the superradiant phase transition (SPT) in an indirect Rabi model, where both a two-level system and a single mode bosonic field couple to an auxiliary bosonic field. We find that the indirect spin-field coupling induced by the virtual excitation of the auxiliary field can allow the occurrence of a SPT at a critical point, and the influence of the so-called $A^2$ term in the normal Rabi model is naturally avoided. In the large detuning regime, we present the analytical expression of quantum critical point in terms of the original system parameters. The critical atom-field coupling strength is tunable, which will loosen the conditions on realizing the SPT. Considering a hybrid magnon-cavity-qubit system, we predict the squeezed cat state of magnon generated with feasible experimental parameters, which has potential applications in quantum metrology and quantum information processing.

12 pages, 8 figures

References in corpus (17)

• Coupling Superconducting Qubits via a Cavity Bus
• Beyond the Jaynes-Cummings model: circuit QED in the ultrastrong coupling regime
• Microwave photonics with superconducting quantum circuits
• Strongly coupled magnons and cavity microwave photons
• Hybrid quantum systems based on magnonics
• Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
• High Cooperativity Cavity QED with Magnons at Microwave Frequencies
• Observation of Dicke Superradiance for Two Artificial Atoms in a Cavity with High Decay Rate
• Observation of a quantum phase transition in the quantum Rabi model with a single trapped ion
• Remote generation of magnon Schrödinger cat state via magnon-photon entanglement
• Probing the Dynamics of Superradiant Quantum Phase Transition in a Single Trapped-Ion
• Approaching to the deep-strong photon-to-magnon coupling
• Collective fluorescence and decoherence of a few nearly identical quantum dots
• Generalized rotating-wave approximation to the two-qubit and cavity coupling system
• Emergent Universality in a Quantum Tricritical Dicke Model
• Quantum criticality in a generalized Dicke model
• Attempt to find the hidden symmetry in the asymmetric quantum Rabi model