"Negative probabilities" as relative probabilistic expressions
2019
Here we briefly discuss how negative numbers, or "negative probabilities", can naturally arise in probabilistic expressions and be given an operational interpretation. Like the use of negative numbers in arithmetical expressions, the use of negative probabilities can have substantial practical value. Indeed, some of the ideas discussed here have led to stochastic simulation algorithms that require much less memory than the best classical algorithms known to date [arXiv:1906.00263].
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