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Exploration of Potential Energy and Charge Dynamics in Simulated Particle Systems

This document analyzes the potential energy states of various particle systems, focusing on the interactions between "common" and "unique" particles. It discusses the initial and final total potential energies (U0, U1 for common-unique pairs and V0, V1 for common-common pairs), emphasizing how the charge of an uncharged unique particle affects the total energy dynamics. The exploration includes queries on the necessity of using multiple simulation threads, raising the question of whether a single thread suffices for simulations varying only in the charge of the unique particle.

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Exploration of Potential Energy and Charge Dynamics in Simulated Particle Systems

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  1. Utotal el. pot. energy , V is just the potential of common-unique pairs, W is just the potential of common-common pairs. Initial system (total el. pot. energy U0) Final system (total el. pot. energy U1) A A C Direction of the transformation. (uncharged) C B B A, B “common” particles, C “unique” particle which is going to be uncharged. where So the simulated systems in different values differ in charge of the particle C, which decreases as increases. During the simulation in given lambda value we just calculate this quantity where qCis the original charge of particle C.

  2. Utotal el. pot. energy Initial system (total el. pot. energy V0) Final system (total el. pot. energy V1) A A C Direction of the transformation. (uncharged) C B B A, B “common” particles, C “unique” particle which is going to be uncharged. So the simulated systems in different values differ in charge of the particle C, which decreases as increases. where If this interpretation is OK, why we need 2 simultaneous sander threadsfor MD run with given lambda value if the simulated systems differ just in charge of particle C ?So just normal (one sander thread) MD should be OK for each lambda value simply just using actual charge value for C particle. During the simulation in given lambda value we just calculate this quantity where qCis the original charge of particle C.

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