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Incoherent-mediator for quantum state transfer in the ultrastrong coupling regime.

ABSTRACT: We study quantum state transfer between two qubits coupled to a common quantum bus that is constituted by an ultrastrong coupled light-matter system. By tuning both qubit frequencies on resonance with a forbidden transition in the mediating system, we demonstrate a high-fidelity swap operation even though the quantum bus is thermally populated. We discuss a possible physical implementation in a realistic circuit QED scheme that leads to the multimode Dicke model. This proposal may have applications on hot quantum information processing within the context of ultrastrong coupling regime of light-matter interaction.

SUBMITTER: Cardenas-Lopez FA

PROVIDER: S-EPMC5482826 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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Incoherent-mediator for quantum state transfer in the ultrastrong coupling regime.

Cárdenas-López F A FA Albarrán-Arriagada F F Barrios G Alvarado GA Retamal J C JC Romero G G

Scientific reports 20170623 1

We study quantum state transfer between two qubits coupled to a common quantum bus that is constituted by an ultrastrong coupled light-matter system. By tuning both qubit frequencies on resonance with a forbidden transition in the mediating system, we demonstrate a high-fidelity swap operation even though the quantum bus is thermally populated. We discuss a possible physical implementation in a realistic circuit QED scheme that leads to the multimode Dicke model. This proposal may have applicati ...[more]

PMID: 28646203

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