Due to their long lifetimes, indirect excitons can cool to below the temperature of quantum degeneracy. This gives an opportunity to experimentally study cold composite bosons. Both theoretically predicted phenomena and phenomena that have not been anticipated were observed in a cold gas of indirect excitons. In this contribution, we overview our studies of cold indirect excitons over the past ...

The problem of social consensus is approached from the perspective of nonlinear dynamics of interacting agents in a complex network. Some basic concepts, such as dynamical metastability, are discussed in the framework of the prototype voter model. In the context of Axelrod’s model for the dissemination of culture we describe a co-evolutionary dynamics formulation with recent results on group fo...

In this paper we investigate the occurrence of multipole moments of a collection of spins in a quantum magnetic system. To get insights into the behaviour of such systems we start by considering small spin clusters composed of dimers, trimers, as well as mixed spin systems with four spins. We focus our attention on the quantum multipole states, that gave rise to the widely discussed spin nemati...

We study long-range magnitude cross-correlations in collective modes of real-world data from finance, physiology, and genomics using time-lag random matrix theory. We find longrange magnitude cross-correlations i) in time series of price fluctuations, ii) in physiological time series, both healthy and pathological, indicating scale-invariant interactions between different physiological time ser...

Relativistically invariant self-similarity approach is applied for description of collective particle production by femtosecond laser pulses. Recent outstanding advances in laser technique, namely, generation of ultrashort laser pulses ensuring intensities on the target of an order of 10 W/cm opened a wide class of new phenomena of production of intense and "highly-coherent" beams of radiations...

Collective phenomena and their associated movement patterns are ubiquitous in everyday life. However, even though we need to be able to reason about these phenomena, especially their movement patterns, research suggests that we do not currently possess the tools for doing so. Research has been carried out into the movement patterns of particular types of collective but there appears to be no re...

Based on rare fluctuations in strong interactions, we argue that there is a physical resemblance between the high multiplicity events photo-nuclear collisions and those $pA$ collisions, which interesting long range collective phenomena are discovered. This indicates collectivity can also be studied certain kinematic regions of upcoming electron-ion collider (EIC), where incoming virtual photon ...