cond-mat.stat-mech papers

Statistical mechanics explores how the chaotic motion of countless tiny particles gives rise to the predictable laws governing heat, pressure, and phase transitions. This field bridges the gap between the microscopic world of atoms and the macroscopic reality we experience daily, offering deep insights into why materials behave the way they do.

On Gist.Science, we process every new preprint in this category as it appears on arXiv to make these complex findings accessible to everyone. For each paper, we provide both a plain-language explanation for the curious reader and a detailed technical summary for specialists, ensuring that groundbreaking research is never lost behind a wall of jargon.

Below are the latest papers in statistical mechanics, freshly curated and summarized to help you understand the cutting edge of this fascinating discipline.

🔬 condensed matter

Thermal phase transitions in a mixed-spin Ising model on the Lieb lattice: Exact results beyond zero magnetic field

This paper presents an exact analytical solution and Monte Carlo verification for a mixed-spin Ising model on a Lieb lattice, revealing a rich phase diagram with ferrimagnetic, disordered, and ferromagnetic phases, including dome-shaped discontinuous transitions, Ising-type critical lines, and reentrant behavior, all exactly solvable at finite magnetic fields when the effective field vanishes.

Jozef Strecka, Katarina Karlova2026-07-14

🔬 condensed matter

Still life in a classic Blume-Capel model: pseudo-transitions in a spin-1 diamond chain

This paper employs the transfer-matrix method to exactly solve a spin-1 Blume-Capel diamond chain, demonstrating that an extremely small energy gap between a nondegenerate ground state and macroscopically degenerate excited states induces entropically-driven pseudo-transitions characterized by abrupt yet continuous changes in thermodynamic quantities.

Elham Shahhosseini Shahrabadi, Majid Moradi, Jozef Strecka2026-07-14

🔬 condensed matter

A Fokker-Planck approach to a stochastic multiplicative wealth model with taxation and redistribution

This paper extends a stochastic multiplicative wealth model by developing a Fokker-Planck framework for general state-dependent taxation and redistribution protocols, deriving analytical stationary distributions and demonstrating through simulations that specific nonuniform schemes, such as conditional cash transfers, can significantly mitigate wealth inequality.

Iago Nascimento Barros, Marcelo Lobato Martins, Celia Anteneodo2026-07-14

🔬 condensed matter

Extending the Mpemba effect to the underdamped realm

This paper investigates the Mpemba effect in the underdamped regime, demonstrating through perturbation theory and numerical simulations that while the effect persists for sufficiently large damping, it is generally absent in the ultra-weak damping limit for smooth single-well potentials but can emerge in more complex double-well potentials.

Shahaf Aharony Shapira, Gene Chen, Marija Vucelja, Oren Raz2026-07-14

🔬 condensed matter

The magnetization process of classical Heisenberg magnets with non-coplanar cuboc ground states

This paper investigates the magnetization processes of classical Heisenberg magnets on kagomé and square kagomé lattices featuring non-coplanar cuboctahedral ground states, revealing universal properties such as non-linear magnetization curves and field-driven phase transitions through both numerical simulations and analytical methods applied to a paradigmatic 12-spin model.

Johannes Richter, Heinz-Jürgen Schmidt, Jürgen Schnack2026-07-13

🔬 condensed matter

Understanding entropy production via a thermal zero-player game

The paper introduces the Ising-Conway Entropy Game (ICEg), a self-driven thermal zero-player system that combines features of lattice gases and Ising models to demonstrate a universal, temperature- and size-independent bound on entropy production, offering a novel framework for exploring stochastic thermodynamics.

M. Süzen2026-07-13

⚛️ quantum physics

Stochastic Quantum Information Geometry and Speed Limits at the Trajectory Level

This paper introduces the conditional quantum Fisher information (CQFI) as a trajectory-level generalization of the standard quantum Fisher information, enabling the derivation of a stochastic quantum speed limit and revealing how a negative interference cross-term between classical and quantum channels serves as a local witness of destructive interference in individual measurement records.

Pedro B. Melo, Pedro V. Paraguassú, Sílvio M. Duarte Queirós, Fernando Iemini, Mauro Paternostro, Welles A. M. Morgado2026-07-13

🔬 condensed matter

Exact Lindbladian Dynamics from Conformal Embeddings and Topological Defects in Conformal Field Theory

This paper demonstrates that intrinsic conformal structures, specifically conformal embeddings and topological defect lines, enable exact solutions for the dynamics of open quantum systems in (1+1)D conformal field theories by organizing the Lindbladian evolution into solvable hierarchies and diagonal sectors.

Chen Bai2026-07-13

🔬 condensed matter

Structural Origin of Water Heat Capacity Anomaly from Classical and Quantum Simulations

Using classical and quantum simulations with machine-learning potentials, this study reveals that water's anomalous heat capacity arises from structural fluctuations between low- and high-density local structures, while nuclear quantum effects primarily suppress high-frequency vibrations.

Kam-Tung Chan, Dylan A. Folkner, Margaret L. Berrens, Alexei A. Stuchebrukhov, Lee-Ping Wang, Davide Donadio2026-07-13

🔬 condensed matter

The scales of disorder in perfect quasicrystals

This paper reveals that increasing rotational symmetry in perfect quasicrystals progressively conceals their deterministic order behind an emergent disorder-like regime, defining a symmetry-controlled critical point and a new "statistical unit cell" that bridges the gap between crystalline order, quasicrystalline complexity, and amorphous disorder.

Alan Rodrigo Mendoza Sosa, Atahualpa S. Kraemer, Michael Schmiedeberg, Erdal C. Oğuz2026-07-13

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