  Adiabatic process has found many important applications in modern physics,
the distinct merit of which is that it does not need accurate control over the
timing of the process. However, it is a slow process, which limits the
application in quantum computation, due to the limited coherent times of
typical quantum systems. Here, we propose a scheme to implement quantum state
conversion in opto-electro-mechanical systems via shortcut to adiabaticity,
where the process can be greatly speeded up while the precise timing control is
still not necessary. In our scheme, only by modifying the coupling strength, we
can achieve fast quantum state conversion with high fidelity, where the
adiabatic condition does not need to be met. In addition, the population of the
unwanted intermediate state can be further suppressed. Therefore, our protocol
presents an important step towards practical state conversion between optical
and microwave photons, and thus may find many important applications in hybrid
quantum information processing.
