Energy–time uncertainty relation for driven quantum systems
Sebastian Deffner, Eric A. Lutz · Journal of Physics A Mathematical and Theoretical · 2013
We derive generalizations of the energy–time uncertainty relation for driven quantum systems. Using a geometric approach based on the Bures length between mixed quantum states, we obtain explicit expressions for the quantum speed limit time, valid for arbitrary initial and final quantum states and arbitrary unitary driving protocols. Our results establish the fundamental limit on the rate of evolution of closed quantum systems.