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Relevant bibliographies by topics / Collective fluctuations

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Journal articles

Academic literature on the topic 'Collective fluctuations'

Author: Grafiati

Published: 4 May 2024

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Journal articles on the topic "Collective fluctuations"

1

Qian, Wei-Liang, Kai Lin, Chong Ye, Jin Li, Yu Pan, and Rui-Hong Yue. "On Statistical Fluctuations in Collective Flows." Universe 9, no. 2 (2023): 67. http://dx.doi.org/10.3390/universe9020067.

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In relativistic heavy-ion collisions, event-by-event fluctuations are known to have non-trivial implications. Even though the probability distribution is geometrically isotropic for the initial conditions, the anisotropic εn still differs from zero owing to the statistical fluctuations in the energy profile. On the other hand, the flow harmonics extracted from the hadron spectrum using the multi-particle correlators are inevitably subjected to non-vanishing variance due to the finite number of hadrons emitted in individual events. As one aims to extract information on the fluctuations in the initial conditions via flow harmonics and their fluctuations, finite multiplicity may play a role in interfering with such an effort. In this study, we explore the properties and impacts of such fluctuations in the initial and final states, which both notably appear to be statistical ones originating from the finite number of quanta of the underlying system. We elaborate on the properties of the initial-state eccentricities for the smooth and event-by-event fluctuating initial conditions and their distinct impacts on the resulting flow harmonics. Numerical simulations are performed. The possible implications of the present study are also addressed.

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2

Mendels, Dan, GiovanniMaria Piccini, and Michele Parrinello. "Collective Variables from Local Fluctuations." Journal of Physical Chemistry Letters 9, no. 11 (2018): 2776–81. http://dx.doi.org/10.1021/acs.jpclett.8b00733.

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3

Benhassine, B., M. Farine, E. S. Hernandez, D. Idier, B. Remaud, and F. Sebille. "Phase space fluctuations and dynamics of fluctuations of collective variables." Nuclear Physics A 545, no. 1-2 (1992): 81–86. http://dx.doi.org/10.1016/0375-9474(92)90448-s.

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4

Klimin, Serghei, Jacques Tempere, and Hadrien Kurkjian. "Low-Lying Collective Excitations of Superconductors and Charged Superfluids." Condensed Matter 8, no. 2 (2023): 42. http://dx.doi.org/10.3390/condmat8020042.

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We investigate theoretically the momentum-dependent frequency and damping of low-lying collective excitations of superconductors and charged superfluids in the BCS–BEC crossover regime. The study is based on the Gaussian pair-and-density fluctuation method for the propagator of Gaussian fluctuations of the pair and density fields. Eigenfrequencies and damping rates are determined in a mutually consistent nonperturbative way as complex poles of the fluctuation propagator. Particular attention is paid to new features with respect to preceding theoretical studies, which were devoted to collective excitations of superconductors in the far BCS regime. We find that at a sufficiently strong coupling, new branches of collective excitations appear, which manifest different behavior as functions of the momentum and the temperature.

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5

Masuda, Naoki, Yoji Kawamura, and Hiroshi Kori. "Collective fluctuations in networks of noisy components." New Journal of Physics 12, no. 9 (2010): 093007. http://dx.doi.org/10.1088/1367-2630/12/9/093007.

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6

Perarnau-Llobet, Martí, and Raam Uzdin. "Collective operations can extremely reduce work fluctuations." New Journal of Physics 21, no. 8 (2019): 083023. http://dx.doi.org/10.1088/1367-2630/ab36a9.

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7

König, Jürgen, John Schliemann, T. Jungwirth, and A. H. MacDonald. "Collective spin fluctuations in diluted magnetic semiconductors." Physica E: Low-dimensional Systems and Nanostructures 12, no. 1-4 (2002): 379–82. http://dx.doi.org/10.1016/s1386-9477(01)00308-3.

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8

Wan, Yi, and Richard M. Stratt. "Collective fluctuations of conserved variables in liquids." Journal of Chemical Physics 98, no. 4 (1993): 3224–39. http://dx.doi.org/10.1063/1.464095.

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9

Pfitzner, A., L. M�nchow, and P. M�dler. "One-body dynamics modified by collective fluctuations." Zeitschrift f�r Physik A Atomic Nuclei 331, no. 1 (1988): 43–51. http://dx.doi.org/10.1007/bf01289429.

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10

Tsytovich, V. N., R. Bingham, U. de Angelis, and A. Forlani. "Collective effects in bremsstrahlung in plasmas." Journal of Plasma Physics 56, no. 1 (1996): 127–47. http://dx.doi.org/10.1017/s0022377800019140.

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The results of recent developments in the theory of fluctuations in plasmas show that the previously used theory of bremsstrahlung is incomplete and the exact expressions for bremsstrahlung should include transition bremsstrahlung. The collective effects in bremsstrahlung known previously as Debye screening are changed to a qualitatively different structure, which removes the effect of ion polarization in bremsstrahlung and introduces a new effective polarization which depends on an effective ion charge and electron velocity. The results may be relevant for applications in plasmas when the wavelength is greater than the Debye length. It is shown that for the problem of photon transport in the solar interior the correct collective corrections to the bremsstrahlung change the opacity by only about −0·35%, which is less than was calculated previously when collective effects in bremsstrahlung where estimated without taking recent results of plasma fluctuation theory into account.

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