  Many versions of Thermodynamic Uncertainty Relations (TUR) have recently been
discovered, which impose lower bounds on relative fluctuations of integrated
currents in irreversible dissipative processes, and suggest that there may be
fundamental limitations on the precision of small scale machines and heat
engines. In this work we rigorously demonstrate that TUR can be evaded by using
dynamic protocols that are asymmetric under time-reversal. We illustrate our
results using a model heat engine using two-level systems, and also discuss
heuristically the fundamental connections between TUR and time-reversal
symmetry.
