Spin glass ≈ Spin glass
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Quasi-Many-Body Localization in Translation-Invariant Systems Open
We examine localization phenomena associated with generic, high entropy, states of a translation-invariant, one-dimensional spin ladder. At early times, we find slow growth of entanglement entropy consistent with the known phenomenology of…
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Marginally stable equilibria in critical ecosystems Open
In this work we study the stability of the equilibria reached by ecosystems\nformed by a large number of species. The model we focus on are Lotka-Volterra\nequations with symmetric random interactions. Our theoretical analysis,\nconfirmed …
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Disorder-Induced Quantum Spin Liquid in Spin Ice Pyrochlores Open
We propose that in a certain class of magnetic materials, known as non-Kramers "spin ice," disorder induces quantum entanglement. Instead of driving glassy behavior, disorder provokes quantum superpositions of spins throughout the system a…
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Deriving covariant holographic entanglement Open
We provide a gravitational argument in favour of the covariant holographic entanglement entropy proposal. In general time-dependent states, the proposal asserts that the entanglement entropy of a region in the boundary field theory is give…
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The Mpemba effect in spin glasses is a persistent memory effect Open
Significance The Mpemba effect, wherein an initially hotter system relaxes faster when quenched to lower temperatures than an initially cooler system, has attracted much attention. Paradoxically, its very existence is a hot topic. Using ma…
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Nonstoquastic Hamiltonians and quantum annealing of an Ising spin glass Open
We study the role of Hamiltonian complexity in the performance of quantum annealers. We consider two general classes of annealing Hamiltonians: stoquastic ones, which can be simulated efficiently using the quantum Monte Carlo algorithm, an…
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Zero-temperature quantum annealing bottlenecks in the spin-glass phase Open
A promising approach to solving hard binary optimization problems is quantum adiabatic annealing in a transverse magnetic field. An instantaneous ground state—initially a symmetric superposition of all possible assignments of N qubits—is c…
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Best-case performance of quantum annealers on native spin-glass benchmarks: How chaos can affect success probabilities Open
Recent tests performed on the D-Wave Two quantum annealer have revealed no clear evidence of speedup over conventional silicon-based technologies. Here, we present results from classical parallel-tempering Monte Carlo simulations combined …
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Glassy behavior in a one-dimensional continuous-wave erbium-doped random fiber laser Open
The analogue of the paramagnetic to spin-glass phase transition in disordered\nmagnetic systems, leading to the phenomenon of replica symmetry breaking, has\nbeen recently demonstrated in a two-dimensional random laser consisting of an\nor…
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Glassy Phase of Optimal Quantum Control Open
We study the problem of preparing a quantum many-body system from an initial to a target state by optimizing the fidelity over the family of bang-bang protocols. We present compelling numerical evidence for a universal spin-glasslike trans…
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Gardner physics in amorphous solids and beyond Open
One of the most remarkable predictions to emerge out of the exact infinite-dimensional solution of the glass problem is the Gardner transition. Although this transition was first theoretically proposed a generation ago for certain mean-fie…
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Spin Glass Theory and Far Beyond Open
About sixty years ago, the anomalous magnetic response of certain magnetic alloys drew the attention of theoretical physicists. It soon became clear that understanding these systems, now called spin glasses, would give rise to a new branch…
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Quantum spin liquid at finite temperature: Proximate dynamics and persistent typicality Open
Quantum spin liquids are long-range entangled states of matter with emergent gauge fields and fractionalized excitations. While candidate materials, such as the Kitaev honeycomb ruthenate α–RuCl3, show magnetic order at low temperatures T,…
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Scalable Spin-Glass Optical Simulator Open
Many developments in science and engineering depend on tackling complex optimizations on large scales. The challenge motivates intense search for specific computing hardware that takes advantage from quantum features, nonlinear dynamics, o…
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B-site disorder driven multiple-magnetic phases: Griffiths phase, re-entrant cluster glass, and exchange bias in Pr2CoFeO6 Open
The magnetic spin ordering and the magnetization dynamics of a double perovskite Pr2CoFeO6 have been investigated by employing the (dc and ac) magnetization and neutron powder diffraction techniques. The study revealed that Pr2CoFeO6 adopt…
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Experimental Observation of Phase Transitions in Spatial Photonic Ising Machine Open
Statistical spin dynamics plays a key role in understanding the working principle for novel optical Ising machines. Here, we propose the gauge transformation for a spatial photonic Ising machine, where a single spatial phase modulator simu…
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Rejuvenation and Memory Effects in a Structural Glass Open
We show numerically that a three-dimensional model for structural glass displays aging, rejuvenation, and memory effects when subjected to a temperature cycle. These effects indicate that the free energy landscape of structural glasses may…
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A heterometallic (Fe<sub>6</sub>Na<sub>8</sub>) cage-like silsesquioxane: synthesis, structure, spin glass behavior and high catalytic activity Open
The exotic “Asian Lantern” heterometallic cage silsesquioxane [(PhSiO1.5)20(FeO1.5)6(NaO0.5)8(n-BuOH)9.6(C7H8)] (I) was obtained and characterized by X-ray diffraction, EXAFS, topological analyses and DFT calculation.
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Magnetic frustration control through tunable stereochemically driven disorder in entropy-stabilized oxides Open
Entropy-stabilized oxides possess a large configurational entropy that allows for the unique ability to include typically immiscible concentrations of species in different configurations. Particularly in oxides, where the physical behavior…
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Influence of spin glass-like magnetic relaxation on the zero-field-cooled exchange bias effect Open
The zero-field-cooled exchange bias (ZEB) effect is a remarkable phenomenon recently reported for some reentrant spin glass-like compounds. In this work, the time-evolution of magnetization is thoroughly investigated for two ZEB materials …
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Competing Spin Liquids and Hidden Spin-Nematic Order in Spin Ice with Frustrated Transverse Exchange Open
Frustration in magnetic interactions can give rise to disordered ground states with subtle and beautiful properties. The spin ices Ho2Ti2O7 and Dy2Ti2O7 exemplify this phenomenon, displaying a classical spin-liquid state, with fractionaliz…
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Clustering of Nonergodic Eigenstates in Quantum Spin Glasses Open
The two primary categories for eigenstate phases of matter at a finite temperature are many-body localization (MBL) and the eigenstate thermalization hypothesis (ETH). We show that, in the paradigmatic quantum p-spin models of the spin-gla…
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Boosting Monte Carlo simulations of spin glasses using autoregressive neural networks Open
The autoregressive neural networks are emerging as a powerful computational tool to solve relevant problems in classical and quantum mechanics. One of their appealing functionalities is that, after they have learned a probability distribut…
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Universal spin-glass behaviour in bulk LaNiO<sub>2</sub>, PrNiO<sub>2</sub> and NdNiO<sub>2</sub> Open
Motivated by the recent discovery of superconductivity in infinite-layer nickelate thin films, we report on a synthesis and magnetization study on bulk samples of the parent compounds R NiO 2 ( R = La, Pr, Nd). The frequency-dependent peak…
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Switchable slow relaxation of magnetization in the native low temperature phase of a cooperative spin-crossover compound Open
Field-induced slow relaxation of magnetization arising from local trigonal distortion at high-spin Fe(II) sites in [Fe(mtz)6](CF3SO3)2 is reversibly switched through light irradiation, the first example of native and switchable Single-Mole…
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Aging Rate of Spin Glasses from Simulations Matches Experiments Open
Experiments on spin glasses can now make precise measurements of the exponent z(T) governing the growth of glassy domains, while our computational capabilities allow us to make quantitative predictions for experimental scales. However, exp…
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Vogel-Fulcher-Tammann freezing of a thermally fluctuating artificial spin ice probed by x-ray photon correlation spectroscopy Open
We report on the crossover from the thermal to the athermal regime of an artificial spin ice formed from a square array of magnetic islands whose lateral size, 30 nm × 70 nm, is small enough that they are dynamic at room temperature.We use…
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Nontrivial Critical Fixed Point for Replica-Symmetry-Breaking Transitions Open
The transformation of the free-energy landscape from smooth to hierarchical is one of the richest features of mean-field disordered systems. A well-studied example is the de Almeida-Thouless transition for spin glasses in a magnetic field,…
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Gardner Transition in Physical Dimensions Open
The Gardner transition is the transition that at mean-field level separates a stable glass phase from a marginally stable phase. This transition has similarities with the de Almeida-Thouless transition of spin glasses. We have studied a we…
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Tropical Tensor Network for Ground States of Spin Glasses Open
We present a unified exact tensor network approach to compute the ground state energy, identify the optimal configuration, and count the number of solutions for spin glasses. The method is based on tensor networks with the tropical algebra…