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International Journal of Theoretical Physics

Shortcut to Adiabatic Two-qubit State Swap in a Superconducting Circuit QED via Effective Drivings

Ming Li, Xin-Ping Dong, Run‐Ying Yan, Xiao-Jing Lu, Zheng‐Yin Zhao, Zhi‐Bo Feng

Published Sep 28, 2021• 0 citations
Publisher
DOI
10.1007/s10773-021-04958-y

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Abstract Optimal generation of photon Fock states is of significance to quantum science and technology. Here we develop a theoretical scheme for fast generating microwave photon Fock states in a circuit quantum electrodynamics (QED) via invariant-based shortcuts to adiabaticity. A superconducting transmon qubit is dispersively coupled to a cavity field of transmission line resonator. Two classical drivings are applied to a composite system, consisting of a transmon qubit and cavity field. In the two-photon resonance with a large intermediate-level detuning, a single-photon Fock state can be fast created by inversely engineering Rabi couplings. With the assistance of auxiliary driving, qubit state can be initialized for inducing multi-photon Fock states in the shortcut manner. Due to negligible leakage effects and high robustness, our scheme offers a potential way to rapidly prepare photon Fock states with a superconducting qubit in circuit QED.