AUTHOR=Li Jia-Xin , Cárdenas-López F. A. , Chen Xi 

TITLE=Shortcuts to adiabaticity in a fast controlled-phase gate in superconducting quantum circuits

JOURNAL=Frontiers in Quantum Science and Technology

VOLUME=2

YEAR=2023

URL=https://www.frontiersin.org/journals/quantum-science-and-technology/articles/10.3389/frqst.2023.1135816

DOI=10.3389/frqst.2023.1135816

ISSN=2813-2181

ABSTRACT=<p>Based on renewed interest in the shortcut-to-adiabaticity techniques in quantum control, we propose a reverse-engineering approach to modulate the longitudinal coupling between a pair of two-level systems with a quantized single-mode resonator. This allows us to suppress the unwanted transitions in the time-evolution operator such that the system dynamics resemble a controlled-phase gate acting in the qubit subspace at the nanosecond scale. The reduced gating time mitigates the detrimental effect produced by the loss mechanisms in all aspects. Moreover, we present a possible experimental implementation based on superconducting quantum circuits. Our work further demonstrates the versatility of the reverse-engineering method to enhance quantum protocols based on circuit quantum electrodynamic architecture.</p>