Stabilizing a Bell state by engineering collective photon decay

Stabilizing a Bell state by engineering collective photon decay We propose a dissipation-engineering method for generation and stabilization of a Bell state for two superconducting qubits in coupled circuit quantum electrodynamics architecture. In the scheme, the large dispersive qubit–resonator interaction and resonant photon hopping between resonators jointly induce asymmetric energy gaps in the dressed state subspaces for the qubits and the collective resonator photon modes. The target steady state is reached and protected by applying each qubit with two microwave drives, that perturbatively induce the specific dressed state transition, while simultaneously by employing the decay of the collective photon modes. Numerical simulation verifies that high-fidelity and long-lived two-qubit Bell state can be obtained (based on the recently available experimental parameters) and is robust against the potential fluctuation of the system parameters. Quantum Information Processing Springer Journals

Stabilizing a Bell state by engineering collective photon decay

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Springer US
Copyright © 2015 by Springer Science+Business Media New York
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
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  • Quantum information and computation
    Bennett, CH; Divicenzo, DP

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