Accelerated relaxation and suppressed dynamic heterogeneity in a kinetically constrained (East) model with swaps

Gutiérrez, Ricardo; Garrahan, Juan P.; Jack, Robert L.

doi:10.1088/1742-5468/ab39d8

Cited by 10 publications

(3 citation statements)

References 46 publications

(164 reference statements)

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“…Based on this insight, dynamic facilitation theory [25,26] provides an alternative explanation in which dynamic arrest is attributed to a disorder-order transition in the ensemble of trajectories, much in analogy with the ordering of spins in the Ising model. Over the last 15 years, such dynamical phase transitions have been investigated extensively in lattice [24,[27][28][29], atomistic [30][31][32][33][34], and also quantum [35] model glass formers. However, with the exception of lattice systems [36], the rigorous determination of the nature and order of the transition has received comparably little attention.…”

Section: Introductionmentioning

confidence: 99%

Dynamical coexistence in moderately polydisperse hard-sphere glasses

Campo

Speck

2020

The Journal of Chemical Physics

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We perform extensive numerical simulations of a paradigmatic model glass former, the hard-sphere fluid with 10% polydispersity. We sample from the ensemble of trajectories with fixed observation time, whereby single trajectories are generated by event-driven molecular dynamics. We show that these trajectories can be characterized in terms of local structure, and we find a dynamical-structural (active-inactive) phase transition between two dynamical phases: one dominated by liquid-like trajectories with low degree of local order and one dominated by glassy-like trajectories with a high degree of local order. We show that both phases coexist and are separated by a spatiotemporal interface. Sampling exceptionally long trajectories allows to perform a systematic finite-size scaling analysis. We find excellent agreement with Binder's scaling theory for first-order transitions. Interestingly, the coexistence region narrows at higher densities, supporting the idea of a critical point controlling the dynamic arrest. arXiv:1910.12045v1 [cond-mat.stat-mech]

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Section: Introductionmentioning

confidence: 99%

Dynamical coexistence in moderately polydisperse hard-sphere glasses

Campo

Speck

2020

The Journal of Chemical Physics

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“…In this sense, the role that the interaction parameters R and R c play in the swap mechanism is analogous to that of particle diameters in glassy liquids [43]. The effect of swaps is enhanced in Rydberg gases with markedly different interaction parameters, as in highly polydisperse atomistic mixtures [12] or in coarse-grained glassy models with wide local softness distributions [44].…”

Section: A Accelerating Effect Of Swapsmentioning

confidence: 97%

Physical swap dynamics, shortcuts to relaxation, and entropy production in dissipative Rydberg gases

2019

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Dense Rydberg gases are out-of-equilibrium systems where strong density-density interactions give rise to effective kinetic constraints. They cause dynamic arrest associated with highly-constrained many-body configurations, leading to slow relaxation and glassy behavior. Multi-component Rydberg gases feature additional long-range interactions such as excitation-exchange. These are analogous to particle swaps used to artificially accelerate relaxation in simulations of atomistic models of classical glass formers. In Rydberg gases, however, swaps are real physical processes, which provide dynamical shortcuts to relaxation. They permit the accelerated approach to stationarity in experiment and at the same time have an impact on the non-equilibrium stationary state. In particular their interplay with radiative decay processes amplifies irreversibility of the dynamics, an effect which we quantify via the entropy production at stationarity. Our work highlights an intriguing analogy between real dynamical processes in Rydberg gases and artificial dynamics underlying advanced Monte Carlo methods. Moreover, it delivers a quantitative characterization of the dramatic effect swaps have on the structure and dynamics of their stationary state.

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“…The SWAP algorithm was used by Carolina Brito, Edan Lerner, Mike Cates, and Matthieu Wyart to challenge certain thermodynamic theories of the glass transition [2,3]. In this special issue, the SWAP algorithm itself is discussed [1], along with a theoretical interpretation of SWAP [4] and applications to binary systems [5] and kinetically constrained models [6].…”

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confidence: 99%

Preface: Special issue ‘Unifying Concepts in Glass Physics VII’

Royall¹,

Jack²,

Russo³

et al. 2020

J. Stat. Mech.

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This special issue presents papers from the Unifying Concepts in Glass Physics VII conference, which focussed on new developments in our understanding the glass transition, jamming and related slow and complex relaxation in classical and quantum systems, looking for connections between manifestations of glassy phenomena, contrasting statistical mechanics perspectives on these problems, and exploring applications in other areas of soft and active matter, optimisation, information science, and beyond.

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Accelerated relaxation and suppressed dynamic heterogeneity in a kinetically constrained (East) model with swaps

Cited by 10 publications

References 46 publications

Dynamical coexistence in moderately polydisperse hard-sphere glasses

Dynamical coexistence in moderately polydisperse hard-sphere glasses

Physical swap dynamics, shortcuts to relaxation, and entropy production in dissipative Rydberg gases

Preface: Special issue ‘Unifying Concepts in Glass Physics VII’

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