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- W4360889707 abstract "We present two protocols for implementing deterministic non-local multi-qubit quantum gates on qubits coupled to a common cavity mode. The protocols rely only on a classical drive of the cavity modes, while no external drive of the qubits is required. In the first protocol, the state of the cavity follows a closed trajectory in phase space and accumulates a geometric phase depending on the state of the qubits. The second protocol uses an adiabatic evolution of the combined qubit-cavity system to accumulate a dynamical phase. Repeated applications of this protocol allow for the realization of phase gates with arbitrary phases, e.g. phase-rotation gates and multi-controlled-Z gates. For both protocols, we provide analytic solutions for the error rates, which scale as $sim N/sqrt{C}$, with $C$ the cooperativity and $N$ the qubit number. Our protocols are applicable to a variety of systems and can be generalized by replacing the cavity by a different bosonic mode, such as a phononic mode. We provide estimates of gate fidelities and durations for atomic and molecular qubits coupled to optical or microwave cavities, and suggest applications for quantum error correction." @default.
- W4360889707 created "2023-03-25" @default.
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- W4360889707 date "2023-03-23" @default.
- W4360889707 modified "2023-09-27" @default.
- W4360889707 title "Non-Local Multi-Qubit Quantum Gates via a Driven Cavity" @default.
- W4360889707 doi "https://doi.org/10.48550/arxiv.2303.13127" @default.
- W4360889707 hasPublicationYear "2023" @default.
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