2019
DOI: 10.1093/ptep/ptz035
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Analytical evaluation of the numerical coefficients in the Zassenhaus product formula and its applications to quantum and statistical mechanics

Abstract: This paper studies the exponential of the sum of two non-commuting operators as an infinite product of exponential operators involving repeated commutators of increasing order. It will be shown how to determine two coefficients in front of the nested commutators in the Zassenhaus formula. The knowledge of one coefficient is enough to generate a closed formula that has several applications in solving problems ranging from linear differential equations, quantum mechanics to non-linear differential equations.

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Cited by 2 publications
(1 citation statement)
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“…AIC is based on information theory and measures the quality of a model relative to other models, considering the goodness of fit and the simplicity of the model. BIC, on the other hand, is a criterion for model selection among a finite set of models and is derived from a Bayesian point of view, where the best model is the one that maximizes the posterior probability of being the true model [20].…”
Section: Model Fittingmentioning
confidence: 99%
“…AIC is based on information theory and measures the quality of a model relative to other models, considering the goodness of fit and the simplicity of the model. BIC, on the other hand, is a criterion for model selection among a finite set of models and is derived from a Bayesian point of view, where the best model is the one that maximizes the posterior probability of being the true model [20].…”
Section: Model Fittingmentioning
confidence: 99%