… Superconducting qubits 7 , 8 have allowed the realization of strong 9 , 10 and ultrastrong
11 , 12 , 13 coupling … By inductively coupling a flux qubit and an LC oscillator via Josephson …

… , a qubit) and a harmonic oscillator in the ultrastrongcoupling regime, where the coupling
strength … One advantage of superconducting qubits over natural atoms is the additional control …

… flux-based superconducting quantum circuits to reach the ultrastrong-coupling regime 13,14 …
This junction mediates most of the inductive coupling between a superconducting flux qubit …

… Superconducting quantum circuits form a promising platform to realize and study this novel
… the ultrastrong coupling regime. In section 4 the dynamics of the ultrastrong coupling regime …

… 2, the superconducting qubits have entered well into the coherent USC … The rightmost
area is the perturbative deep strong coupling regime pDSC, where the qubit becomes a …

… to reaching the strong coupling regime with superconducting qubits is to inductively couple
flux qubits to the zero-point … In this case, coupling increases with qubit loop area A, with A 8 …

… While this situation is usually encountered for real atoms in cavity QED, it is quite straightforward
to vary the static bias ε of superconducting qubits by an external control parameter such …

… In circuit QED [8] superconducting qubits play the role of artificial atoms. … ultrastrong coupling
regime, and below we will demonstrate that the system indeed shows ultrastrong coupling …

… ancillary flux qubits working in the ultrastrong coupling regime. This regime activates virtual
… Every type of superconducting qubit can be used as data qubit in our protocol. Currently, …

… We report on ultrastrong coupling between a superconducting flux qubit and a resonant …
of two superconducting coplanar stripline resonators coupled galvanically to the qubit. With a …