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Under a general framework, shortcuts to adiabatic processes are shown to bepossible in classical systems. We then study the distribution function of thework done on a small system initially prepared at thermal equilibrium. It isfound that the work fluctuations can be significantly reduced via shortcuts toadiabatic processes. For example, in the classical case probabilities of havingvery large or almost zero work values are suppressed. In the quantum casenegative work may be totally removed from the otherwise non-positive-definitework values. We also apply our findings to a micro Otto-cycle-based heatengine. It is shown that the use of shortcuts, which directly enhances theengine output power, can also increase the heat engine efficiencysubstantially, in both quantum and classical regimes.

Boosting work characteristics and overall heat engine performance via shortcuts to adiabaticity: quantum and classical systems