191 citations · 625 across the 5 of their papers we have counts for
5 papers
Controllable coupling of superconducting flux qubits
S. H. W. van der Ploeg, A. Izmalkov, Alec Maassen van den Brink +5
We have realized controllable coupling between two three-junction flux qubits by inserting an additional coupler loop between them, containing three Josephson junctions. Two of the…
Four-qubit device with mixed couplings
M. Grajcar, A. Izmalkov, S. H. W. van der Ploeg +12
We present the first experimental results on a device with more than two superconducting qubits. The circuit consists of four three-junction flux qubits, with simultaneous ferro- a…
Mediated tunable coupling of flux qubits
Alec Maassen van den Brink, A. J. Berkley, M. Yalowsky
It is sketched how a monostable rf- or dc-SQUID can mediate an inductive coupling between two adjacent flux qubits. The nontrivial dependence of the SQUID's susceptibility on exter…
Evidence for entangled states of two coupled flux qubits
A. Izmalkov, M. Grajcar, E. Il'ichev +6
We have studied the low-frequency magnetic susceptibility of two inductively coupled flux qubits using the impedance measurement technique (IMT), through their influence on the res…
Continuous Monitoring of Rabi Oscillations in a Josephson Flux Qubit
E. Il'ichev, N. Oukhanski, A. Izmalkov +7
Under resonant irradiation, a quantum system can undergo coherent (Rabi) oscillations in time. We report evidence for such oscillations in a _continuously_ observed three-Josephson…