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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 i
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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
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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 wav
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11

Zhang, H. P., A. Be'er, E. L. Florin, and H. L. Swinney. "Collective motion and density fluctuations in bacterial colonies." Proceedings of the National Academy of Sciences 107, no. 31 (2010): 13626–30. http://dx.doi.org/10.1073/pnas.1001651107.

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12

Ziherl, P., A. Šarlah, and S. Žumer. "Collective fluctuations and wetting in nematic liquid crystals." Physical Review E 58, no. 1 (1998): 602–9. http://dx.doi.org/10.1103/physreve.58.602.

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13

Prakashchand, Dube Dheeraj, Navjeet Ahalawat, Satyabrata Bandyopadhyay, Surajit Sengupta, and Jagannath Mondal. "Nonaffine Displacements Encode Collective Conformational Fluctuations in Proteins." Journal of Chemical Theory and Computation 16, no. 4 (2020): 2508–16. http://dx.doi.org/10.1021/acs.jctc.9b01100.

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14

Fulde, P., and K. W. Becker. "Collective density fluctuations in heavy‐fermion systems (invited)." Journal of Applied Physics 63, no. 8 (1988): 3673–75. http://dx.doi.org/10.1063/1.340682.

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15

Mädler, P., L. Münchow, and A. Pfitzner. "Randomization of single-particle motion by collective fluctuations." Physics Letters B 198, no. 1 (1987): 25–28. http://dx.doi.org/10.1016/0370-2693(87)90150-x.

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16

MATHAI, NEBU JOHN, and TAKIS ZOURNTOS. "EMERGENT FLUCTUATIONS IN THE TRAJECTORIES OF AGENT COLLECTIVES." Fluctuation and Noise Letters 07, no. 04 (2007): L429—L437. http://dx.doi.org/10.1142/s0219477507004057.

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Characteristics of the collective behavior of groups have been studied in diverse disciplines; in this work, we present an approach grounded in robotics. We first specify a model for collective behavior based on a formulation of a multi-agent robotic system. In contrast to some models found in the literature, we do not use stochastic mechanisms to introduce fluctuations. Rather, we present a fully deterministic model where fluctuations emerge due to the complex dynamics of a high-dimensional coupling of dynamical systems. We investigate the emergence of fluctuations in the trajectories of indi
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17

Khudaiberdiev, Daniiar, Ze Don Kvon, Matvey V. Entin, Dmitriy A. Kozlov, Nikolay N. Mikhailov, and Maxim Ryzhkov. "Mesoscopic Conductance Fluctuations in 2D HgTe Semimetal." Nanomaterials 13, no. 21 (2023): 2882. http://dx.doi.org/10.3390/nano13212882.

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Mesoscopic conductance fluctuations were discovered in a weak localization regime of a strongly disordered two-dimensional HgTe-based semimetal. These fluctuations exist in macroscopic samples with characteristic sizes of 100 μm and exhibit anomalous dependences on the gate voltage, magnetic field, and temperature. They are absent in the regime of electron metal (at positive gate voltages) and strongly depend on the level of disorder in the system. All the experimental facts lead us to the conclusion that the origin of the fluctuations is a special collective state in which the current is cond
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18

LESHANSKY, ALEXANDER M., JEFFREY F. MORRIS, and JOHN F. BRADY. "Collective diffusion in sheared colloidal suspensions." Journal of Fluid Mechanics 597 (February 1, 2008): 305–41. http://dx.doi.org/10.1017/s0022112007009834.

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Collective diffusivity in a suspension of rigid particles in steady linear viscous flows is evaluated by investigating the dynamics of the time correlation of long-wavelength density fluctuations. In the absence of hydrodynamic interactions between suspended particles in a dilute suspension of identical hard spheres, closed-form asymptotic expressions for the collective diffusivity are derived in the limits of low and high Péclet numbers, where the Péclet number ${\it Pe}\,{=}\,\gamdot a^2/D_0$ with $\gamdot$ being the shear rate and D0 = kBT/6πη a is the Stokes–Einstein diffusion coefficient
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19

Schlickeiser, R., and P. H. Yoon. "Quasilinear theory of general electromagnetic fluctuations including discrete particle effects for magnetized plasmas: General analysis." Physics of Plasmas 29, no. 9 (2022): 092105. http://dx.doi.org/10.1063/5.0104709.

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The general quasilinear Fokker–Planck kinetic equation for the gyrophase-averaged plasma particle distribution functions in magnetized plasmas is derived, making no restrictions on the energy of the particles and on the frequency of the electromagnetic fluctuations and avoiding the often made Coulomb approximation of the electromagnetic interactions. The inclusion of discrete particle effects breaks the dichotomy of nonlinear kinetic plasma theory divided into the test particle and the test fluctuation approximation because it provides expression of both the non-collective and collective elect
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20

Hwang, E. H., and S. Das Sarma. "Collective Charge Density Fluctuations in Superconducting Layered Systems with Bilayer Unit Cells." International Journal of Modern Physics B 12, no. 27n28 (1998): 2769–83. http://dx.doi.org/10.1142/s0217979298001617.

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Collective modes of bilayered superconducting superlattices (e.g., YBCO) are investigated within the conserving gauge-invariant ladder diagram approximation including both the nearest interlayer single electron tunneling and the Josephson-type Cooper pair tunneling. By calculating the density–density response function including Coulomb and pairing interactions, we examine the two collective mode branches corresponding to the in-phase and out-of-phase charge fluctuations between the two layers in the unit cell. The out-of-phase collective mode develops a long wavelength plasmon gap whose magnit
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21

Šuvakov, Milovan, and Bosiljka Tadić. "Collective charge fluctuations in single-electron processes on nanonetworks." Journal of Statistical Mechanics: Theory and Experiment 2009, no. 02 (2009): P02015. http://dx.doi.org/10.1088/1742-5468/2009/02/p02015.

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22

Kawaguchi, Koji, Koichi Murase, and Tetsufumi Hirano. "Multiplicity fluctuations and collective flow in small colliding systems." Nuclear Physics A 967 (November 2017): 357–60. http://dx.doi.org/10.1016/j.nuclphysa.2017.07.010.

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23

Rozgacheva, I. K. "Collective dynamics of density fluctuations in a gravitating medium." Astrophysics 28, no. 3 (1988): 368–73. http://dx.doi.org/10.1007/bf01112975.

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24

Zakhvataev, V. E., O. S. Volodko, L. A. Kompaniets, and D. V. Zlobin. "Numerical study of a model of terahertz collective modes in DNA." Journal of Physics: Conference Series 2094, no. 2 (2021): 022012. http://dx.doi.org/10.1088/1742-6596/2094/2/022012.

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Abstract Terahertz density fluctuations in DNA have been recognized to be associated with biological function of DNA and widely studied both experimentally and theoretically. In the present work, we investigate numerically a new model for the terahertz dynamics of density fluctuations in DNA, proposed earlier. This model considers the length scales corresponding to wave numbers up to the position of the maximum of the static structure factor and allows to reflect structural effects caused by the dependence of the static structure factor on wave number. We study the parametric dependencies of t
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25

Hofmann, H., and D. Kiderlen. "A Self-Consistent Treatment of Damped Motion for Stable and Unstable Collective Modes." International Journal of Modern Physics E 07, no. 02 (1998): 243–74. http://dx.doi.org/10.1142/s0218301398000105.

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We address the dynamics of damped collective modes in terms of first and second moments. The modes are introduced in a self-consistent fashion with the help of a suitable application of linear response theory. Quantum effects in the fluctuations are governed by diffusion coefficients Dμν. The latter are obtained through a fluctuation dissipation theorem generalized to allow for a treatment of unstable modes. Numerical evaluations of the Dμν are presented. We discuss briefly how this picture may be used to describe global motion within a locally harmonic approximation. Relations to other method
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26

GNANAPRAGASAM, G., and M. P. DAS. "COLLECTIVE MODES OF TRAPPED INTERACTING BOSONS." International Journal of Modern Physics B 22, no. 25n26 (2008): 4349–57. http://dx.doi.org/10.1142/s0217979208050103.

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The derivation for collective modes of an interacting Bose gas trapped by an isotropic harmonic oscillator potential is presented using field-theoretic method. The presence of the two-body scattering term beyond the mean-field is seen to appear inevitably in the calculations, even in the simplest approximation. As a result we see the occurrence of a small number of non-condensate atoms in the ground state density fluctuations.
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27

Zverevich, Dmitry, and Alex Levchenko. "Transport signatures of plasmon fluctuations in electron hydrodynamics." Low Temperature Physics 49, no. 12 (2023): 1376–84. http://dx.doi.org/10.1063/10.0022363.

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In two-dimensional electron systems, plasmons are gapless and long-lived collective excitations of propagating charge density oscillations. We study the fluctuation mechanism of plasmon-assisted transport in the regime of electron hydrodynamics. We consider pristine electron liquids where charge fluctuations are thermally induced by viscous stresses and intrinsic currents, while attenuation of plasmons is determined by the Maxwell mechanism of charge relaxation. It is shown that, while the contribution of plasmons to the shear viscosity and thermal conductivity of a Fermi liquid is small, plas
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28

Clausen, Sigmund, Geir Helgesen, and Arne T. Skjeltorp. "Braid description of collective fluctuations in a few-body system." Physical Review E 58, no. 4 (1998): 4229–37. http://dx.doi.org/10.1103/physreve.58.4229.

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29

Sano, Yukie. "Correlations and fluctuations in the word sets of collective emotions." Nonlinear Theory and Its Applications, IEICE 9, no. 3 (2018): 382–90. http://dx.doi.org/10.1587/nolta.9.382.

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30

Csernai, László P. "Collective dynamics, fluctuations and instabilities in relativistic heavy-ion collisions." EPJ Web of Conferences 117 (2016): 03001. http://dx.doi.org/10.1051/epjconf/201611703001.

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31

Salman, Hanna, Yoav Soen, and Erez Braun. "Voltage Fluctuations and Collective Effects in Ion-Channel Protein Ensembles." Physical Review Letters 77, no. 21 (1996): 4458–61. http://dx.doi.org/10.1103/physrevlett.77.4458.

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32

Takahashi, Akira, Hong Xiang Wang, and Shaul Mukamel. "Collective charge density fluctuations and nonlinear optical responce of C60." Chemical Physics Letters 216, no. 3-6 (1993): 394–98. http://dx.doi.org/10.1016/0009-2614(93)90115-h.

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33

Bartolotta, Antonino, Gaetano Di Marco, Cirino Vasi, Placido Migliardo, and Marco Villa. "Dynamical properties of LiI⋅D2O: Ion diffusion and collective fluctuations." Physical Review B 33, no. 11 (1986): 7481–87. http://dx.doi.org/10.1103/physrevb.33.7481.

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34

Giraud, B. G., S. Karataglidis, and T. Sami. "Fluctuations of collective coordinates and convexity theorems for energy surfaces." Annals of Physics 376 (January 2017): 296–310. http://dx.doi.org/10.1016/j.aop.2016.11.015.

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35

Antoniou, Dimitri, and Steven D. Schwartz. "Low-Frequency Collective Motions in Proteins." Journal of Theoretical and Computational Chemistry 02, no. 02 (2003): 163–69. http://dx.doi.org/10.1142/s0219633603000458.

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There are several kinds of low-frequency collective motions in proteins, which are believed to have a significant effect on their properties. We propose that a new kind of global collective motion in proteins are density fluctuations, which are slowly-varying, long-lived, propagating disturbances. These can be studied using the linear response formalism, which is a dynamical approximation that uses the full anharmonic interatomic potential. We have performed a molecular dynamics simulation of a realistic protein and have found results that are consistent with the theoretical predictions of lin
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36

Wiechen, H. "New aspects of plasma sheet dynamics - MHD and kinetic theory." Annales Geophysicae 17, no. 5 (1999): 595–603. http://dx.doi.org/10.1007/s00585-999-0595-2.

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Abstract. Magnetic reconnection is a process of fundamental importance for the dynamics of the Earth's plasma sheet. In this context, the development of thin current sheets in the near-Earth plasma sheet is a topic of special interest because they could be a possible cause of microscopic fluctuations acting as collective non-idealness from a macroscopic point of view. Simulations of the near-Earth plasma sheet including boundary perturbations due to localized inflow through the northern (or southern) plasma sheet boundary show developing thin current sheets in the near-Earth plasma sheet about
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37

Robbins, Bruce. "Single? Great? Collective?" South Atlantic Quarterly 119, no. 4 (2020): 789–98. http://dx.doi.org/10.1215/00382876-8663699.

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Fredric Jameson’s latest book, Allegory and Ideology (2019), returns to the provocative proposition that he floated in The Political Unconscious: Narrative as a Socially Symbolic Act (1981): that humankind’s cultural past is only available to us today if we believe that “the human adventure is one”—a series of efforts to wrest a realm of freedom from the realm of necessity. This essay examines the new book for evidence of possible fluctuations in Jameson’s commitment to a “single great collective story,” underlining in particular the subversiveness of the adjective “great” but also his re-affi
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38

Lecheval, Valentin, Li Jiang, Pierre Tichit, Clément Sire, Charlotte K. Hemelrijk, and Guy Theraulaz. "Social conformity and propagation of information in collective U-turns of fish schools." Proceedings of the Royal Society B: Biological Sciences 285, no. 1877 (2018): 20180251. http://dx.doi.org/10.1098/rspb.2018.0251.

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Moving animal groups such as schools of fishes or flocks of birds often undergo sudden collective changes of their travelling direction as a consequence of stochastic fluctuations in heading of the individuals. However, the mechanisms by which these behavioural fluctuations arise at the individual level and propagate within a group are still unclear. In this study, we combine an experimental and theoretical approach to investigate spontaneous collective U-turns in groups of rummy-nose tetra ( Hemigrammus rhodostomus ) swimming in a ring-shaped tank. U-turns imply that fish switch their heading
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39

Shiratani, Masaharu, Masahiro Soejima, Hyun Woong Seo, Naho Itagaki, and Kazunori Koga. "Fluctuation of Position and Energy of a Fine Particle in Plasma Nanofabrication." Materials Science Forum 879 (November 2016): 1772–77. http://dx.doi.org/10.4028/www.scientific.net/msf.879.1772.

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We are developing plasma nanofabrication, namely, nanoand micro scale guided assembly using plasmas. We manipulate nanoand micro objects using electrostatic, electromagnetic, ion drag, neutral drag, and optical forces. The accuracy of positioning the objects depends on fluctuation of position and energy of a fine particle (= each object) in plasmas. Here we evaluate such fluctuations and discuss the mechanism behind them. In the first experiment, we grabbed a fine particle in plasma using an optical tweezers. The fine particle moves in a potential well made by the optical tweezers. This is a k
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40

Llanes-Estrada, Felipe J., Belén Martínez Carmona, and Jose L. Muñoz Martínez. "Velocity fluctuations of fission fragments." International Journal of Modern Physics E 25, no. 02 (2016): 1650009. http://dx.doi.org/10.1142/s0218301316500099.

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We propose event by event velocity fluctuations of nuclear fission fragments as an additional interesting observable that gives access to the nuclear temperature in an independent way from spectral measurements and relates the diffusion and friction coefficients for the relative fragment coordinate in Kramers-like models (in which some aspects of fission can be understood as the diffusion of a collective variable through a potential barrier). We point out that neutron emission by the heavy fragments can be treated in effective theory if corrections to the velocity distribution are needed.
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41

Vidal, F., M. V. Ramallo, J. Mosqueira, and C. Carballeira. "Superconducting Fluctuations Above TC and the Uncertainty Principle: How Small may the Coherence Length be?" International Journal of Modern Physics B 17, no. 18n20 (2003): 3470–72. http://dx.doi.org/10.1142/s0217979203021228.

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We summarize here some of our recent results on the superconducting fluctuation effects above TC in different low- and high-TC superconductors, at high reduced-temperatures and magnetic fields. These results confirm our proposal that the collective behaviour of the fluctuating Cooper pairs in the short-wavelength fluctuation regime is dominated by the uncertainty principle, which imposes a limit to the shrinkage of the superconducting wave function when T increases well above TC or H becomes of the order of Hc2(0), the upper critical magnetic field amplitude extrapolated to T = 0 K .
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42

Moreno-Gámez, Stefany. "How bacteria navigate varying environments." Science 378, no. 6622 (2022): 845. http://dx.doi.org/10.1126/science.adf4444.

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43

Tsytovich, Vadim N. "Description of collective processes and fluctuations in classical and quantum plasmas." Uspekhi Fizicheskih Nauk 159, no. 10 (1989): 335. http://dx.doi.org/10.3367/ufnr.0159.198910d.0335.

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44

Hallatschek, O., and L. Geyrhofer. "Collective Fluctuations in the Dynamics of Adaptation and Other Traveling Waves." Genetics 202, no. 3 (2016): 1201–27. http://dx.doi.org/10.1534/genetics.115.181271.

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45

Su, Zhongqian, Yanchao Wang, Dayi Song, and Weining Zhang. "Fluctuations of collective flows for event-by-event hydrodynamic evolution sources." Journal of Physics: Conference Series 1053 (July 2018): 012085. http://dx.doi.org/10.1088/1742-6596/1053/1/012085.

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46

Rouet, J. L., and M. R. Feix. "Persistence of collective fluctuations inN-body metaequilibrium gravitating and plasma systems." Physical Review E 59, no. 1 (1999): 73–83. http://dx.doi.org/10.1103/physreve.59.73.

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47

Bulanin, Victor V. "Collective CO2-Laser Scattering of Low Friquency Small-Scale Plasma Fluctuations." Fusion Technology 35, no. 1T (1999): 141–45. http://dx.doi.org/10.13182/fst99-a11963839.

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48

Rabani, Eran, and David R. Reichman. "A fully self-consistent treatment of collective fluctuations in quantum liquids." Journal of Chemical Physics 120, no. 3 (2004): 1458–65. http://dx.doi.org/10.1063/1.1631436.

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49

Russo, Daniela, Alessio Laloni, Alessandra Filabozzi, and Matthias Heyden. "Pressure effects on collective density fluctuations in water and protein solutions." Proceedings of the National Academy of Sciences 114, no. 43 (2017): 11410–15. http://dx.doi.org/10.1073/pnas.1705279114.

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Neutron Brillouin scattering and molecular dynamics simulations have been used to investigate protein hydration water density fluctuations as a function of pressure. Our results show significant differences between the pressure and density dependence of collective dynamics in bulk water and in concentrated protein solutions. Pressure-induced changes in the tetrahedral order of the water HB network have direct consequences for the high-frequency sound velocity and damping coefficients, which we find to be a sensitive probe for changes in the HB network structure as well as the wetting of biomol
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50

Kurbatov, A. A., and E. A. Titov. "The influence of collective effects on quantum fluctuations of laser radiation." Optics and Spectroscopy 120, no. 5 (2016): 818–22. http://dx.doi.org/10.1134/s0030400x16050179.

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