Quantum Simulation of an Extended Dicke Model with a Magnetic Solid

Abstract

The Dicke model describes the cooperative interaction of an ensemble of two-level atoms with a single-mode photonic field and exhibits a quantum phase transition as a function of light--matter coupling strength. Extending this model by incorporating short-range atom--atom interactions makes the problem intractable but is expected to produce new phases. Here, we simulate such an extended Dicke model using a crystal of ErFeO${}_3$, where the role of atoms (photons) is played by Er${}^{3+}$ spins (Fe${}^{3+}$ magnons). Through magnetocaloric effect and terahertz magnetospectroscopy measurements, we demonstrated the existence of a novel atomically ordered phase in addition to the superradiant and normal phases that are expected from the standard Dicke model. Further, we elucidated the nature of the phase boundaries in the temperature--magnetic-field phase diagram, identifying both first-order and second-order phase transitions. These results lay the foundation for studying multiatomic quantum optics models using well-characterized many-body condensed matter systems.

References in corpus (25)

• Ultrastrong coupling between light and matter
• Ultrastrong coupling regimes of light-matter interaction
• Quantum Chaos Triggered by Precursors of a Quantum Phase Transition: The Dicke Model
• Entanglement and the Phase Transition in Single Mode Superradiance
• Universally diverging Grueneisen parameter and the magnetocaloric effect close to quantum critical points
• Sign change of the Grueneisen parameter and magnetocaloric effect near quantum critical points
• Dicke Superradiance in Solids
• Quantum chaos and effective thermalization
• High Field Studies of the Hidden Order Transition in URu${}_2$Si${}_2$
• Ultrastrong Magnon-Magnon Coupling Dominated by Antiresonant Interactions
• Quantum phases in circuit QED with a superconducting qubit array
• First-order super-radiant phase transitions in a multi-qubit--cavity system
• Circuit QED and sudden phase switching in a superconducting qubit array
• The Ising model in a light-induced quantized transverse field
• Emergent Universality in a Quantum Tricritical Dicke Model
• Quantum Critical Detector : Amplifying Weak Signals Using First-Order Dynamical Quantum Phase Transitions
• Quantum phase transitions in coupled two-level atoms in a single-mode cavity
• Critical phenomena in an extended Dicke model
• Perfect Intrinsic Squeezing at the Superradiant Phase Transition Critical Point
• Ground state in the finite Dicke model for interacting qubits
• Ground-State Properties for Coupled Bose-Einstein Condensates inside a Cavity Quantum Electrodynamics
• Classical dynamics of a two-species condensate driven by a quantum field
• Quantum Chaos in the Extended Dicke Model
• Critical phenomena in light-matter systems with collective matter interactions
• Field-induced quantum critical point in the new itinerant antiferromagnet Ti${}_3$Cu${}_4$

Cited by in corpus (3)

• Observation of the Magnonic Dicke Superradiant Phase Transition
• Quantum simulation of spin-1/2 XYZ model using solid-state spin centers
• Hierarchic superradiant phases in anisotropic Dicke model