Incoherent-mediator for Quantum State Transfer in the Ultrastrong Coupling Regime

Sci Rep. 2017 Jun 23;7(1):4157. doi: 10.1038/s41598-017-04467-1.


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

Publication types

  • Research Support, Non-U.S. Gov't