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Incoherent-mediator for quantum state transfer in the ultrastrong coupling regime
F. A. Cárdenas-López, F. Albarrán-Arriagada, G. A. Barrios, J. C. Retamal, G. Romero·December 20, 2016·DOI: 10.1038/s41598-017-04467-1
PhysicsMathematicsMedicine
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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.