The content presents a scheme that utilizes local counterdiabatic (CD) driving to provide fast and high-fidelity state preparation in Jaynes-Cummings (JC) lattices. JC lattices, consisting of arrays of JC models, can demonstrate rich physical phenomena but preparing desired quantum states in these systems is challenging due to the requirement for slow adiabatic evolution.
The authors first derive the exact CD Hamiltonian for JC lattices with one excitation, which contains nonlocal couplings between qubits and cavities at different and distant sites, making it difficult to implement in practice. To address this, the authors leverage the symmetries of the eigenstates under both periodic and open boundary conditions to derive a local CD Hamiltonian that generates the same dynamics as the exact CD Hamiltonian.
Numerical simulations confirm the effectiveness of the local CD driving scheme in comparison to the adiabatic evolution and the exact CD Hamiltonian. The authors also demonstrate the use of this method for the generation of multipartite W-states in qubits. The implementation and decoherence of this scheme in superconducting quantum devices are discussed, showing its potential for practical applications in quantum information processing.
To Another Language
from source content
arxiv.org
Key Insights Distilled From
by A. Govindara... at arxiv.org 10-01-2024
https://arxiv.org/pdf/2409.19186.pdfDeeper Inquiries