Quantum memory in an effective $\Lambda$-type system using dynamic detuning control of a superconducting qubit pair

Abstract:We theoretically investigate quantum-light storage in an effective $\Lambda$-type system formed by a pair of tunable superconducting qubits coupled to a semi-infinite transmission line and separated by half a wavelength. The frequency detuning between the qubits directly couples the superradiant excited state and the subradiant metastable state. By adjusting the qubit detuning, the system exhibits a controllable spectral response accompanied by slow-light behavior. Dynamically controlling the detuning enables an incident quantum field to be mapped onto the subradiant collective state, stored as a long-lived excitation, and subsequently retrieved on demand. Our results establish the proposed system as a minimal and tunable quantum-memory architecture for scalable superconducting quantum networks.

arXiv:2609.34201 [quant-ph]

(or arXiv:2609.34201v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2609.34201 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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