Before revision:  However,  the high-reliability limit is subject to a fundamental error-energy-efficiency tradeoff that arises from time-symmetric control . Requiring a low probability of error causes energy consumption to diverge as logarithm of the inverse error rate for nonreciprocal logical transitions.
After revision:  However, the high-reliability limit is subject to a fundamental error-energy-efficiency tradeoff that arises from time-symmetric control : Requiring a low probability of error causes energy consumption to diverge as logarithm of the inverse error rate for nonreciprocal logical transitions.