Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Marco Zannetti"'
Publikováno v:
Entropy, Vol 26, Iss 5, p 367 (2024)
We analyze the general relation between canonical and grand canonical ensembles in the thermodynamic limit. We begin our discussion by deriving, with an alternative approach, some standard results first obtained by Kac and coworkers in the late 1970s
Externí odkaz:
https://doaj.org/article/ddf4ce6dead54b8192e6f0f16a3b0cde
The standard phase-ordering process is obtained by quenching a system, like the Ising model, to below the critical point. This is usually done with periodic boundary conditions to insure ergodicity breaking in the low temperature phase. With this arr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::377b50452e6f4af89d414789610d4125
Publikováno v:
Physical Review E. 99
The ferromagnetic transition in the Ising model is the paradigmatic example of ergodicity breaking accompanied by symmetry breaking. It is routinely assumed that the thermodynamic limit is taken with free or periodic boundary conditions. More exotic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e814498402e616e16b6db1c57ce7c6d6
https://doi.org/10.1103/physreve.99.042122
https://doi.org/10.1103/physreve.99.042122
This paper shows that Bose-Einstein condensates in canonical and grand-canonical conditions stands for different phenomena: the familiar ordering transition in the former opposed to condensation of fluctuations without any ordering in the latter. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32d923bd7e047e28ff6b37fb8877e952
http://hdl.handle.net/11573/1387938
http://hdl.handle.net/11573/1387938
Publikováno v:
Physical review. E, Statistical, nonlinear and soft matter physics (Online) 95 (2017): 052138-1–052138-14. doi:10.1103/PhysRevE.95.052138
info:cnr-pdr/source/autori:A. Crisanti, A. Sarracino, M. Zannetti/titolo:Heat fluctuations of Brownian oscillators in nonstationary processes: Fluctuation theorem and condensation transition/doi:10.1103%2FPhysRevE.95.052138/rivista:Physical review. E, Statistical, nonlinear and soft matter physics (Online)/anno:2017/pagina_da:052138-1/pagina_a:052138-14/intervallo_pagine:052138-1–052138-14/volume:95
info:cnr-pdr/source/autori:A. Crisanti, A. Sarracino, M. Zannetti/titolo:Heat fluctuations of Brownian oscillators in nonstationary processes: Fluctuation theorem and condensation transition/doi:10.1103%2FPhysRevE.95.052138/rivista:Physical review. E, Statistical, nonlinear and soft matter physics (Online)/anno:2017/pagina_da:052138-1/pagina_a:052138-14/intervallo_pagine:052138-1–052138-14/volume:95
We study analytically the probability distribution of the heat released by an ensemble of harmonic oscillators to the thermal bath, in the nonequilibrium relaxation process following a temperature quench. We focus on the asymmetry properties of the h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eda05302c721ec6a09cb11c5639eb836
https://doi.org/10.1103/physreve.95.052138
https://doi.org/10.1103/physreve.95.052138
We argue that a strict relation exists between two in principle unrelated quantities: The size of the growing domains in a coarsening system, and the kinetic roughening of an interface. This relation is confirmed by extensive simulations of the Ising
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb53fa8ff6f840e99cb69b460b4fdcb9
http://hdl.handle.net/11386/4676348
http://hdl.handle.net/11386/4676348
We study numerically the phase-ordering kinetics of the site-diluted and bond-diluted Ising models after a quench from an infinite to a low temperature. We show that the speed of growth of the ordered domain's size is non-monotonous with respect to t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb61e469804c419d79b3976448b40f7b
http://arxiv.org/abs/1509.05308
http://arxiv.org/abs/1509.05308
Autor:
Marco Zannetti
The so-called grand canonical catastrophe of the density fluctuations in the ideal Bose gas is shown to be a particular instance of the much more general phenomenon of condensation of fluctuations, taking place in a large system, in or out of equilib
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81aba5d165e793b52e0cda5c7210fde9
http://arxiv.org/abs/1507.01975
http://arxiv.org/abs/1507.01975
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 344:440-446
The properties of the response function and the fluctuation dissipation relation in phase-ordering systems are discussed. These issues are shown to be highly nontrivial even in the relatively simple case of coarsening dynamics considered here. It is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb1d65e5e9ffe6cf961f4f08ad6ccfb6
https://doi.org/10.1016/j.physa.2004.06.012
https://doi.org/10.1016/j.physa.2004.06.012
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 314:454-461
In the late stage dynamics of systems evolving via domain coarsening, the linear response function splits into the sum of a stationary term, due to thermal fluctuations within domains, and of an aging term due to off-equilibrium interface dynamics. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::667a9de7a97433ebbc0739475170c00d
https://doi.org/10.1016/s0378-4371(02)01081-6
https://doi.org/10.1016/s0378-4371(02)01081-6