Anomalous heating in a colloidal system

A Kumar, R Chétrite… - Proceedings of the …, 2022 - National Acad Sciences
We report anomalous heating in a colloidal system, an experimental observation of the
inverse Mpemba effect, where for two initial temperatures lower than the temperature of the …

Faster uphill relaxation in thermodynamically equidistant temperature quenches

A Lapolla, A Godec - Physical Review Letters, 2020 - APS
We uncover an unforeseen asymmetry in relaxation: for a pair of thermodynamically
equidistant temperature quenches, one from a lower and the other from a higher …

Mpemba effect in a Langevin system: Population statistics, metastability, and other exact results

A Biswas, R Rajesh, A Pal - The Journal of chemical physics, 2023 - pubs.aip.org
The Mpemba effect is a fingerprint of the anomalous relaxation phenomenon wherein an
initially hotter system equilibrates faster than an initially colder system when both are …

Mpemba effect in driven granular gases: Role of distance measures

A Biswas, VV Prasad, R Rajesh - Physical Review E, 2023 - APS
The Mpemba effect refers to the counterintuitive effect where a system which is initially
further from the final steady state equilibrates faster than an identical system that is initially …

Mpemba effect in an anisotropically driven granular gas

A Biswas, VV Prasad, R Rajesh - Europhysics Letters, 2022 - iopscience.iop.org
The Mpemba effect refers to the counterintuitive relaxation wherein a hotter system
equilibrates faster than a cooler system when quenched to a cold temperature. Even though …

Mpemba effect for a Brownian particle trapped in a single well potential

A Biswas, R Rajesh - Physical Review E, 2023 - APS
The Mpemba effect refers to the counterintuitive phenomenon of a hotter system
equilibrating faster than a colder system when both are quenched to the same low …

Mpemba effect in anisotropically driven inelastic Maxwell gases

A Biswas, VV Prasad, R Rajesh - Journal of Statistical Physics, 2022 - Springer
Through an exact analysis, we show the existence of Mpemba effect in an anisotropically
driven inelastic Maxwell gas, a simplified model for granular gases, in two dimensions …

Mpemba effect in the relaxation of an active Brownian particle in a trap without metastable states

A Biswas, R Rajesh - The Journal of Chemical Physics, 2025 - pubs.aip.org
We explore the role of activity in the occurrence of the Mpemba effect within a system of an
active colloid diffusing in a potential landscape devoid of metastable minimum. The Mpemba …

Mpemba effect on non-equilibrium active Markov chains

A Biswas, A Pal - arxiv preprint arxiv:2403.17547, 2024 - arxiv.org
We study the Mpemba effect on a non-equilibrium Markov chain that mimics the run and
tumble motion of an active particle in a discrete energy landscape. The broken detailed …

Speedups in nonequilibrium thermal relaxation: Mpemba and related effects

G Teza, J Bechhoefer, A Lasanta, O Raz… - arxiv preprint arxiv …, 2025 - arxiv.org
Most of our intuition about the behavior of physical systems is shaped by observations at or
near thermal equilibrium. However, even a thermal quench can lead to states far from …