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

Research paper by F. A. Cárdenas-López, F. Albarrán-Arriagada, G. Alvarado Barrios, J. C. Retamal, G. Romero

Indexed on: 20 Dec '16Published on: 20 Dec '16Published in: arXiv - Quantum Physics


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. This proposal may have applications on hot quantum information processing within the context of ultrastrong coupling regime of light-matter interaction.