Shortcuts to adiabatic passage for multiqubit controlled-phase gate
Yan Liang, Qi‐Cheng Wu, Shi‐Lei Su, Xin Ji, Shou Zhang · Physical Review A · 2015
We propose an alternative scheme of shortcuts to a quantum controlled phase gate in a much shorter time based on the approach of Lewis-Riesenfeld invariants in cavity quantum electrodynamics systems. This scheme can be used to perform a one-qubit phase gate, a two-qubit controlled phase gate, as well as a multiqubit controlled phase gate. The strict numerical simulations demonstrate that the total operation time for implementing controlled phase gates is much shorter than previous schemes and very robust against decoherence.