Generation of higher dimensional entangled states in quantum Rabi systems

TL;DR

This paper proposes protocols to generate high-dimensional entangled states in quantum Rabi systems using coherent control in the ultrastrong coupling regime, with potential applications in circuit QED.

Contribution

It introduces novel protocols for creating high-dimensional entangled states in anharmonic oscillators via light-matter interactions in the ultrastrong coupling regime.

Findings

Protocols are robust against dissipative effects

Applicable to current circuit quantum electrodynamics setups

Demonstrates feasibility of high-dimensional entanglement generation

Abstract

We present protocols for the generation of high-dimensional entangled states of anharmonic oscillators by means of coherent manipulation of light-matter systems in the ultrastrong coupling regime. Our protocols consider a pair of ultrastrong coupled qubit-cavity systems, each coupled to an ancilla qubit, and combine classical pulses plus the selection rules imposed by the parity symmetry. We study the robustness of the entangling protocols under dissipative effects. This proposal may have applications within state-of-art circuit quantum electrodynamics.