Other Physical Sciences

The “Other Physical Sciences” domain encompasses research on non-equilibrium phenomena, emergent behaviour and advanced material architectures that extend beyond classical mechanics, electromagnetism and quantum many-body physics. It unites studies of driven soft-matter assemblies, complex fluids, wave turbulence, photonic and topological structures, and the network-like organisation of matter under extreme conditions. In this field, researchers probe how local interactions and external driving forces generate spontaneous pattern formation, collective phase transitions and anomalous transport. Progress relies on a close interplay between theoretical frameworks (including scaling and network models), large-scale simulation and high-resolution experiment. Practical outcomes range from adaptive optical materials and programmable colloidal actuators to improved understanding of industry-relevant supercritical processes and robust control recipes for active biological and synthetic systems.

Research from Nature Portfolio

Recent studies have realised photoresponsive colloidal swarms by decorating TiO₂ particles with spectrally distinct dyes and illuminating them to program reversible gelation and colour-changing phase segregation. These dynamic assemblies adapt their morphology and optical response on demand by tuning light wavelength and intensity. Another advance extends active-matter physics to proliferating systems in which particle birth and death interplay with self-propulsion, revealing new classes of collective dynamics and suggesting universality beyond fixed-number suspensions. In the high-pressure regime, supercritical fluids have been recast as complex networks of molecular clusters: a hidden-variable network model quantitatively links microstructural self-similarity to macroscopic response functions, unifying solvent behaviour across the supercritical frontier.

Research from all publishers

In bottom-up photonic materials, programmable self-assembly routes have yielded single-network colloidal gyroids with enantiomorphic architectures and complete optical bandgaps, opening pathways to robust natural-frequency chiral photonic crystals. On the turbulence front, one-dimensional numerical experiments on a prototype wave model have rigorously verified the convergence of dynamics to the weak-turbulence kinetic spectrum, recovering theoretical constants with high precision in the kinetic limit. Meanwhile, a mechanistic cluster model has elucidated the nonlinear thermodynamic anomalies of supercritical fluids by partitioning energy exchange into density fluctuations, inter-cluster separation and molecular transfer, accounting for peaks in heat capacity and other response functions along the liquid–gas crossover.

Other Physical Sciences publication trend

The graph below shows the total number of articles in other physical sciences across all publications each year (not limited to Nature Index journals).

Technical terms

Non-equilibrium system: A system driven by sustained inputs or gradients that prevent relaxation to thermodynamic equilibrium.

Active matter: Assemblies of units that consume energy locally to generate persistent motion or stresses, yielding collective phenomena such as swarming or phase separation.

Supercritical fluid: A state of matter above its critical temperature and pressure in which liquid and gas phases merge and exhibit continuous thermodynamic response.

Complex network: A representation of microstructural or dynamical relationships by nodes and links, whose topology governs macroscopic behaviour.

Motility-induced phase separation: Demixing of self-propelled particles into dense and dilute regions driven solely by persistent motion and steric effects.

Hidden-variable model: A statistical framework that assigns latent parameters to network nodes to reproduce observed connectivity and dynamics.

References

1. Proliferating active matter. Nature Reviews Physics (2023).
2. Photochromism from wavelength-selective colloidal phase segregation. Nature (2023).
3. Supercritical fluids behave as complex networks. Nature Communications (2023).
4. Programmed Self‐Assembly of Single Colloidal Gyroids for Chiral Photonic Crystals. Advanced Materials (2023).
5. Verification of wave turbulence theory in the kinetic limit. Physical Review Research (2024).
6. Heterogeneous Cluster Energetics and Nonlinear Thermodynamic Response in Supercritical Fluids. Physical Review Letters (2024).