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<p>Understanding why hotter water can freeze faster than colder water — a phenomenon known as the Mpemba effect — is important for gaining deeper insights into systems far from equilibrium. Despite growing interest, this effect has not been demonstrated in computer simulations of ice formation. Using the TIP4P/Ice model, we show that the Mpemba effect appears in our simulated systems and observe its manifestation also during fluid-to-solid transitions in the case of simpler Lennard-Jones systems. We extend this investigation to magnetic transitions, revealing that the effect can arise from different mechanisms: for the TIP4P/Ice model, the effect arises from how long the system remains in a metastable state, while for other systems, it results from differences in critical fluctuations in the initial states. These findings suggest a universal behavior and are contrary to the common belief that metastability is a necessary requirement.</p><p></p>

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Simulations of Mpemba effect in water and Lennard-Jones models

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月29日

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  • Soumik Ghosh,
  • Purnendu Pathak,
  • Sohini Chatterjee,
  • Subir K. Das

摘要

Understanding why hotter water can freeze faster than colder water — a phenomenon known as the Mpemba effect — is important for gaining deeper insights into systems far from equilibrium. Despite growing interest, this effect has not been demonstrated in computer simulations of ice formation. Using the TIP4P/Ice model, we show that the Mpemba effect appears in our simulated systems and observe its manifestation also during fluid-to-solid transitions in the case of simpler Lennard-Jones systems. We extend this investigation to magnetic transitions, revealing that the effect can arise from different mechanisms: for the TIP4P/Ice model, the effect arises from how long the system remains in a metastable state, while for other systems, it results from differences in critical fluctuations in the initial states. These findings suggest a universal behavior and are contrary to the common belief that metastability is a necessary requirement.