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Emergence of collective oscillations in human crowds
Analysis of the confined crowds at the San Fermín festival in Spain shows that dense crowds can self-organize into macroscopic chiral oscillators, coordinating the orbital motion of hundreds of individuals without external guidance.
Beyond fluids, descriptions of living matter as continua have been instrumental in understanding the large-scale flows of the cytoskeleton, cell tissues and animal groups, where the interactions between the elementary units remain largely unknown 8, 9, 10, 11. 1c), a joyful mass of people dressed in white clothes progressively gathers on the plaza, where they dance, sing, drink and celebrate, until the crowd becomes closely packed, thereby preventing the participants from moving freely (Fig. To determine how the active friction force depends on the local state of the crowd we compute the spectra S v, \({S}_{{v}^{2}}\), the distribution of the spin variable ϵ( t), the amplitude of velocity fluctuations v ⋆(radius of the limit cycles when they exist) and the angular frequency of oscillation Ω ⋆.
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