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Quantum information processing requires fast manipulations of quantum systemsin order to overcome dissipative effects. We propose a method to acceleratequantum dynamics and obtain a target state in a shorter time relative tounmodified dynamics, and apply the theory to a system consisting of twolinearly coupled qubits. We extend the technique to accelerate quantumadiabatic evolution in order to rapidly generate a desired target state,thereby realizing a shortcut to adiabaticity. Further, we address experimentallimitations to the rate of change of control parameters for quantum deviceswhich often limit one's ability to generate a desired target state with highfidelity. We show that an initial state following decelerated dynamics canreach a target state while varying control parameters more slowly, enablingmore experimentally feasible driving schemes.

Acceleration and deceleration of quantum dynamics based on inter-trajectory travel with fast-forward scaling theory