Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Theory of magnon polaritons in quantum Ising materials

Journal Article · · Physical Review A
Here, we present a theory of magnon-polaritons in quantum Ising materials, and develop a formalism describing the coupling between light and matter as an Ising system is tuned through its quantum critical point. The theory is applied to Ising materials having multilevel single-site Hamiltonians, in which multiple magnon modes are present, such as the insulating Ising magnet LiHoF4. We find that the magnon-photon coupling strengths may be tuned by the applied transverse field, with the coupling between the soft mode present in the quantum Ising material and a photonic resonator mode diverging at the quantum critical point of the material. A fixed system of spins will not exhibit the diamagnetic response expected when light is coupled to mobile spins or atoms. Without the diamagnetic response, one expects a divergent magnon-photon coupling strength to lead to a superradiant quantum phase transition. However, this neglects the effects of damping and decoherence present in any real system. We show that damping and decoherence may block the superradiant quantum phase transition, and lead to weak coupling between the soft magnon mode and the resonator mode. The results of the theory are applied to experimental data on the model system LiHoF4 in a microwave resonator.
Research Organization:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0014866
OSTI ID:
2420397
Journal Information:
Physical Review A, Journal Name: Physical Review A Journal Issue: 4 Vol. 106; ISSN 2469-9926
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (61)

Introduction to the Dicke Model: From Equilibrium to Nonequilibrium, and Vice Versa journal October 2018
Many-Particle Physics book January 1990
Quantum Optics book January 2008
Quantum Ising Phases and Transitions in Transverse Ising Models book January 2013
Study of the cavity-magnon-polariton transmission line shape journal September 2016
The theory of a general quantum system interacting with a linear dissipative system journal October 1963
On the superradiant phase transition for molecules in a quantized radiation field: the dicke maser model journal April 1973
Quantum tunnelling in a dissipative system journal September 1983
Quantum Field Theory and Condensed Matter book January 2017
Lattice Vibrations and Optical Waves in Ionic Crystals journal May 1951
Bose–Einstein condensation of exciton polaritons journal September 2006
No-go theorem for superradiant quantum phase transitions in cavity QED and counter-example in circuit QED journal September 2010
Observation of the exceptional point in cavity magnon-polaritons journal November 2017
Exploring dynamical phase transitions with cold atoms in an optical  cavity journal April 2020
Ultrastrong coupling between light and matter journal January 2019
Resonant Modes of Ferromagnetic Spheroids journal March 1958
Measurement of thermo-optic properties of Y3Al5O12, Lu3Al5O12, YAIO3, LiYF4, LiLuF4, BaY2F8, KGd(WO4)2, and KY(WO4)2 laser crystals in the 80–300K temperature range journal November 2005
Dissipative couplings in cavity magnonics journal April 2020
Exact solution of polaritonic systems with arbitrary light and matter frequency-dependent losses journal February 2022
Ising model in a transverse field. I. Basic theory journal August 1973
Keldysh field theory for driven open quantum systems journal August 2016
Dicke time crystals in driven-dissipative quantum many-body systems journal July 2019
Experimental implementations of cavity-magnon systems: from ultra strong coupling to applications in precision measurement journal September 2019
Rare Earth Magnetism book June 1991
Magnetostatic Modes in Ferromagnetic Resonance journal January 1957
Theory of the Contribution of Excitons to the Complex Dielectric Constant of Crystals journal December 1958
Coherence in Spontaneous Radiation Processes journal January 1954
Gauge invariance of the Dicke and Hopfield models journal August 2020
Driven-dissipative Ising model: An exact field-theoretical analysis journal August 2021
Quantum fluctuations and correlations in open quantum Dicke models journal July 2022
Phase Transition in the Dicke Model of Superradiance journal March 1973
Quantum-classical crossover of a field mode journal March 2009
Keldysh approach for nonequilibrium phase transitions in quantum optics: Beyond the Dicke model in optical cavities journal February 2013
Quantum dynamics of the driven and dissipative Rabi model journal August 2014
Polariton spectrum of the Dicke-Ising model journal November 2017
Quantum dynamics in strongly driven random dipolar magnets journal June 2020
Limits to magnetic quantum criticality from nuclear spins journal February 2021
Quantum tunneling in the presence of an arbitrary linear dissipation mechanism journal August 1984
Theory of the magnetic phase diagram of Li Ho F 4 journal October 2004
Perturbative quantum Monte Carlo study of LiHoF 4 in a transverse magnetic field journal November 2008
Size dependence of strong coupling between nanomagnets and photonic cavities journal September 2010
Probing strongly hybridized nuclear-electronic states in a model quantum ferromagnet journal December 2016
Thermodynamics of a quantum Ising system coupled to a spin bath journal June 2018
Chaos and the quantum phase transition in the Dicke model journal June 2003
Cavity QED Based on Collective Magnetic Dipole Coupling: Spin Ensembles as Hybrid Two-Level Systems journal February 2009
Strong Field Interactions between a Nanomagnet and a Photonic Cavity journal February 2010
Light-Matter Decoupling in the Deep Strong Coupling Regime: The Breakdown of the Purcell Effect journal January 2014
Strongly Coupled Magnons and Cavity Microwave Photons journal October 2014
Discrete Time-Crystalline Order in Cavity and Circuit QED Systems journal January 2018
Direct Observation of Collective Electronuclear Modes about a Quantum Critical Point journal November 2021
Phase Transitions, Two-Level Atoms, and the A 2 Term journal August 1975
Quantum Critical Behavior for a Model Magnet journal July 1996
Entanglement and the Phase Transition in Single-Mode Superradiance journal February 2004
Critical fluctuations at a many-body exceptional point journal July 2020
Dynamics of the dissipative two-state system journal January 1987
Introduction to quantum noise, measurement, and amplification journal April 2010
Quantum Phase Transition of a Magnet in a Spin Bath journal April 2005
Exceptional points in optics and photonics journal January 2019
Entanglement-based single-shot detection of a single magnon with a superconducting qubit journal January 2020
Quantum Dissipative Systems book March 2008
Hybrid quantum systems based on magnonics journal June 2019

Similar Records

Direct Observation of Collective Electronuclear Modes about a Quantum Critical Point
Journal Article · Thu Nov 11 19:00:00 EST 2021 · Physical Review Letters · OSTI ID:1980229

Observation of the magnonic Dicke superradiant phase transition
Journal Article · Thu Apr 03 20:00:00 EDT 2025 · Science Advances · OSTI ID:2558011

Voltage control of cavity magnon polariton
Journal Article · Mon Jul 18 00:00:00 EDT 2016 · Applied Physics Letters · OSTI ID:22594469