Výsledky vyhledávání - "J. Baschnagel"

Different types of spatial correlation functions for non-ergodic stochastic processes of macroscopic systems

Autor: J P, Wittmer, A N, Semenov, J, Baschnagel

Publikováno v: The European physical journal. E, Soft matter. 45(8)

Focusing on non-ergodic macroscopic systems, we reconsider the variances [Formula: see text] of time averages [Formula: see text] of time-series [Formula: see text]. The total variance [Formula: see text] (direct average over all time series) is know

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::b442d38747eccdc10d3059a77501c7e3
https://pubmed.ncbi.nlm.nih.gov/35933461

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Theory of length-scale dependent relaxation moduli and stress fluctuations in glass-forming and viscoelastic liquids

Autor: L. Klochko, J. Baschnagel, J. P. Wittmer, H. Meyer, O. Benzerara, A. N. Semenov

Publikováno v: Journal of Chemical Physics
Journal of Chemical Physics, 2022, 156 (16), pp.164505. ⟨10.1063/5.0085800⟩

International audience; The spatiotemporal correlations of the local stress tensor in supercooled liquids are studied both theoretically and by molecular dynamics simulations of a two-dimensional (2D) polydisperse Lennard-Jones system. Asymptotically

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::feb28432e6b6c8eb053a07f2aa975f03
https://hal.science/hal-03806940/document

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Simple models for strictly non-ergodic stochastic processes of macroscopic systems

Autor: G, George, L, Klochko, A N, Semenov, J, Baschnagel, J P, Wittmer

Publikováno v: The European physical journal. E, Soft matter. 44(10)

We investigate simple models for strictly non-ergodic stochastic processes [Formula: see text] (t being the discrete time step) focusing on the expectation value v and the standard deviation [Formula: see text] of the empirical variance [Formula: see

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::c31e1beda0ddc5a5f9720b0ccf25d1f1
https://pubmed.ncbi.nlm.nih.gov/34633552

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Role of torsional potential in chain conformation, thermodynamics, and glass formation of simulated polybutadiene melts

Autor: F. Demydiuk, M. Solar, H. Meyer, O. Benzerara, W. Paul, J. Baschnagel

Publikováno v: Journal of Chemical Physics
Journal of Chemical Physics, 2022, 156 (23), pp.234902. ⟨10.1063/5.0094536⟩

For polymer chains, the torsional potential is an important intramolecular energy influencing chain flexibility and segmental dynamics. Through molecular dynamics simulations of an atomistic model for melts of cis– trans-1,4-polybutadiene (PBD), we

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89a418ac2048990e37b4e082e76e19fe
https://doi.org/10.1063/5.0094536

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Fluctuations of non-ergodic stochastic processes

Autor: G, George, L, Klochko, A N, Semenov, J, Baschnagel, J P, Wittmer

Publikováno v: The European physical journal. E, Soft matter. 44(4)

We investigate the standard deviation [Formula: see text] of the variance [Formula: see text] of time series [Formula: see text] measured over a finite sampling time [Formula: see text] focusing on non-ergodic systems where independent "configuration

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::590bf49a460a890309862a751f770123
https://pubmed.ncbi.nlm.nih.gov/33866449

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Simple models for strictly non-ergodic stochastic processes of macroscopic systems

Autor: J. P. Wittmer, G. George, Alexander N. Semenov, J. Baschnagel, L. Klochko

Publikováno v: European Physical Journal E: Soft matter and biological physics
European Physical Journal E: Soft matter and biological physics, 2021, 44 (10), pp.125. ⟨10.1140/epje/s10189-021-00129-3⟩

We investigate simple models for strictly non-ergodic stochastic processes $x_t$ ($t$ being the discrete time step) focusing on the expectation value $v$ and the standard deviation $\delta v$ of the empirical variance $v[x]$ of finite time series $x$

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::470ab6e3290fab1ec64efd486549e412

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Microscopic Structure of Compacted Polyelectrolyte Complexes: Insights from Molecular Dynamics Simulations

Autor: Diddo Diddens, Albert Johner, J. Baschnagel

Publikováno v: ACS Macro Letters. 8:123-127

We utilize atomistic molecular dynamics (MD) simulations to study local structural changes inside a polyelectrolyte complex consisting of poly(styrenesulfonate) (PSS) and poly(diallyldimethylammonium) (PDADMA) upon densification, in analogy to ultrac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a42117fc112f559a38a51fd188e5322
https://doi.org/10.1021/acsmacrolett.8b00630

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Shear-stress relaxation in free-standing polymer films

Autor: G. George, Hendrik Meyer, Ivan Kriuchevskyi, J. Baschnagel, J. P. Wittmer

Publikováno v: Physical Review E : Statistical, Nonlinear, and Soft Matter Physics
Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 2018, ⟨10.1103/PhysRevE.98.062502⟩
Physical Review E
Physical Review E, 2018, 98 (6), pp.062502. ⟨10.1103/PhysRevE.98.062502⟩

Using molecular dynamics simulation of a polymer glass model we investigate free-standing polymer films focusing on the in-plane shear modulus $\ensuremath{\mu}$, defined by means of the stress-fluctuation formula, as a function of temperature $T$, f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b8484c4a6fc120b3aebc7ca1cfac6e8
https://doi.org/10.1103/physreve.98.062502

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