Collateral coupling between superconducting resonators: Fast and high fidelity generation of qudit-qudit entanglement

• URL: http://arxiv.org/abs/2305.03564v1
• Date: Fri, 5 May 2023 14:16:03 GMT
• Title: Collateral coupling between superconducting resonators: Fast and high fidelity generation of qudit-qudit entanglement
• Authors: Pedro Rosario, Alan C. Santos, Celso Jorge Villas-Boas, Romain Bachelard
• Abstract summary: Superconducting circuits are highly controllable platforms to manipulate quantum states. We show how the existence of a distance-independent interaction between microwave resonators coupled capacitively through a qubit offers a new control parameter toward this goal.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Superconducting circuits are highly controllable platforms to manipulate quantum states, which make them particularly promising for quantum information processing. We here show how the existence of a distance-independent interaction between microwave resonators coupled capacitively through a qubit offers a new control parameter toward this goal. This interaction is able to induce an idling point between resonant resonators, and its state-dependent nature allows one to control the flow of information between the resonators. The advantage of this scheme over previous one is demonstrated through the generation of high-fidelity NOON states between the resonators, with a lower number of operations than previous schemes. Beyond superconducting circuits, our proposal could also apply to atomic lattices with clock transitions in optical cavities, for example.

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