Tuning high-Q nonlinear dynamics in a disordered quantum magnet

Silevitch, D. M.; Tang, C.; Aeppli, G.; Rosenbaum, T. F.

doi:10.1038/s41467-019-11985-1

Title: Tuning high-Q nonlinear dynamics in a disordered quantum magnet

Abstract

Quantum states cohere and interfere. Atoms arranged imperfectly in a solid rarely display these properties. Here we demonstrate an exception in a disordered quantum magnet that divides itself into nearly isolated subsystems. We probe these coherent spin clusters by driving the system nonlinearly and measuring the resulting hole in the linear spectral response. The Fano shape of the hole encodes the incoherent lifetime as well as coherent mixing of the localized excitations. For the Ising magnet LiHo_0.045Y_0.955F₄, the quality factor Q for spectral holes can be as high as 100,000. We tune the dynamics by sweeping the Fano mixing parameter q through zero via the ac pump amplitude as well as a dc transverse field. The zero crossing of q is associated with a dissipationless response at the drive frequency. Identifying localized two-level systems in a dense and disordered magnet advances the search for qubit platforms emerging from strongly interacting, many-body systems.

Authors:

Silevitch, D. M. ^[1]; Tang, C. ^[1]; Aeppli, G. ^[2]; Rosenbaum, T. F. ^[1]

California Inst. of Technology (CalTech), Pasadena, CA (United States)
ETH Zurich (Switzerland); EPF Lausanne (Switzerland); Paul Scherrer Inst. (PSI), Villigen (Switzerland)

Publication Date:: 2019-09-05

Research Org.:: California Institute of Technology (CalTech), Pasadena, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1612260

Grant/Contract Number:: SC0014866

Resource Type:: Accepted Manuscript

Journal Name:: Nature Communications

Additional Journal Information:: Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723

Publisher:: Nature Publishing Group

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Science & technology - other topics; Magnetic properties and materials; Phase transitions and critical phenomena

Citation Formats


                    Silevitch, D. M., Tang, C., Aeppli, G., and Rosenbaum, T. F. Tuning high-Q nonlinear dynamics in a disordered quantum magnet.  United States: N. p., 2019. 
Web.  doi:10.1038/s41467-019-11985-1.

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                    Silevitch, D. M., Tang, C., Aeppli, G., & Rosenbaum, T. F. Tuning high-Q nonlinear dynamics in a disordered quantum magnet.  United States.  https://doi.org/10.1038/s41467-019-11985-1

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                    Silevitch, D. M., Tang, C., Aeppli, G., and Rosenbaum, T. F. Thu .  
"Tuning high-Q nonlinear dynamics in a disordered quantum magnet".  United States.  https://doi.org/10.1038/s41467-019-11985-1.  https://www.osti.gov/servlets/purl/1612260.

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@article{osti_1612260,

  title        = {Tuning high-Q nonlinear dynamics in a disordered quantum magnet},

  author       = {Silevitch, D. M. and Tang, C. and Aeppli, G. and Rosenbaum, T. F.},

  abstractNote = {Quantum states cohere and interfere. Atoms arranged imperfectly in a solid rarely display these properties. Here we demonstrate an exception in a disordered quantum magnet that divides itself into nearly isolated subsystems. We probe these coherent spin clusters by driving the system nonlinearly and measuring the resulting hole in the linear spectral response. The Fano shape of the hole encodes the incoherent lifetime as well as coherent mixing of the localized excitations. For the Ising magnet LiHo0.045Y0.955F4, the quality factor Q for spectral holes can be as high as 100,000. We tune the dynamics by sweeping the Fano mixing parameter q through zero via the ac pump amplitude as well as a dc transverse field. The zero crossing of q is associated with a dissipationless response at the drive frequency. Identifying localized two-level systems in a dense and disordered magnet advances the search for qubit platforms emerging from strongly interacting, many-body systems.},

  doi          = {10.1038/s41467-019-11985-1},

  journal      = {Nature Communications},

  number       = 1,

  volume       = 10,

  place        = {United States},

  year         = {2019},

  month        = {9}

}

Copy to clipboard

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Title: Tuning high-Q nonlinear dynamics in a disordered quantum magnet

Abstract

Citation Formats

Induced Random Fields in the LiHo x Y 1 − x F 4 Quantum Ising Magnet in a Transverse Magnetic Field journal, December 2006

Localization-protected quantum order journal, July 2013

Evidence of Spin Glass Dynamics in Dilute LiHo x Y 1 − x F 4 journal, October 2008

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Derivation of the low- T phase diagram of LiHo x Y 1 − x F 4 : A dipolar quantum Ising magnet journal, August 2008

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Derivation of the low- $T$ phase diagram of ${LiHo}_{x} Y_{1 - x} F_{4}$ : A dipolar quantum Ising magnet
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Absence of Diffusion in Certain Random Lattices
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Decoherence in a superconducting quantum bit circuit
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Optical response from terahertz to visible light of electronuclear transitions in ${LiYF}_{4} : {Ho}^{3 +}$
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Spin-Glass Transition at Nonzero Temperature in a Disordered Dipolar Ising System: The Case of ${LiHo}_{x} Y_{1 - x} F_{4}$
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Significance of the Hyperfine Interactions in the Phase Diagram of ${LiHo}_{x} Y_{1 - x} F_{4}$
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Field dependent specific heat study of the dipolar Ising ferromagnet LiHoF4
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Critical behavior of the magnetic susceptibility of the uniaxial ferromagnet LiHo $F_{4}$
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Quantum Phase Transition of a Magnet in a Spin Bath
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Fano interference governs wave transport in disordered systems
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Many-body localization: An introduction and selected topics
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Nuclear Spin Driven Quantum Relaxation in ${LiY}_{0.998} {Ho}_{0.002} F_{4}$
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A ferromagnet in a continuously tunable random field
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Entangled quantum state of magnetic dipoles
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Probing many-body dynamics on a 51-atom quantum simulator
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The Basis of the Electron Theory of Metals, with Special Reference to the Transition Metals
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Untwinned single crystals of $Y {Ba}_{2} {Cu}_{3} O_{7 - δ}$ : An optical investigation of the $a - b$ anisotropy
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Dynamics of a Many-Body-Localized System Coupled to a Bath
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Contribution of spin pairs to the magnetic response in a dilute dipolar ferromagnet
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Phase transitions in a programmable quantum spin glass simulator
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Localization of interacting fermions at high temperature
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Quantum Critical Behavior for a Model Magnet
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Quantum and Classical Glass Transitions in ${LiHo}_{x} Y_{1 - x} F_{4}$
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Observation of many-body localization of interacting fermions in a quasirandom optical lattice
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Exploring the many-body localization transition in two dimensions
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Controlling the sign of quantum interference by tunnelling from quantum wells
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Coherent Spin Oscillations in a Disordered Magnet
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Experimental phase diagram and dynamics of a dilute dipolar-coupled Ising system
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Theory of the magnetic phase diagram of $Li Ho F_{4}$
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Metal–insulator transition in a weakly interacting many-electron system with localized single-particle states
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Decoherence, Continuous Observation, and Quantum Computing: A Cavity QED Model
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Many-Body Localization in Periodically Driven Systems
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Using thermal boundary conditions to engineer the quantum state of a bulk magnet
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Stress Tuning of the Metal-Insulator Transition at Millikelvin Temperatures
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Comprehensive Encoding and Decoupling Solution to Problems of Decoherence and Design in Solid-State Quantum Computing
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Effects of Configuration Interaction on Intensities and Phase Shifts
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From classical to quantum glass
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Switchable hardening of a ferromagnet at fixed temperature
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The nonlinear Fano effect
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Thermodynamics of a quantum Ising system coupled to a spin bath
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Many-Body Localization and Thermalization in Quantum Statistical Mechanics
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Self-Induced Transparency
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Tunable quantum tunnelling of magnetic domain walls
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Interacting Electrons in Disordered Wires: Anderson Localization and Low- $T$ Transport
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Spin Manipulation of Free Two-Dimensional Electrons in $Si / SiGe$ Quantum Wells
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Magnetic properties of lithium rare-earth fluorides: Ferromagnetism in LiEr $F_{4}$ and LiHo $F_{4}$ and crystal-field parameters at the rare-earth and Li sites
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Magnetic excitations near the quantum phase transition in the Ising ferromagnet $Li Ho F_{4}$
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Quantum Projection in an Ising Spin Liquid
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Scaling Studies of Highly Disordered Spin-½ Antiferromagnetic Systems
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