Four-qubit device with mixed couplings
Superconductivity
2007-05-23 v2 Mesoscale and Nanoscale Physics
Quantum Physics
Abstract
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- and antiferromagnetic coupling implemented using shared Josephson junctions. Its response, which is dominated by the ground state, is characterized using low-frequency impedance measurement with a superconducting tank circuit coupled to the qubits. The results are found to be in excellent agreement with the quantum-mechanical predictions.
Cite
@article{arxiv.cond-mat/0509557,
title = {Four-qubit device with mixed couplings},
author = {M. Grajcar and A. Izmalkov and S. H. W. van der Ploeg and S. Linzen and T. Plecenik and Th. Wagner and U. Huebner and E. Il'ichev and H. -G. Meyer and A. Yu. Smirnov and Peter J. Love and Alec Maassen van den Brink and M. H. S. Amin and S. Uchaikin and A. M. Zagoskin},
journal= {arXiv preprint arXiv:cond-mat/0509557},
year = {2007}
}
Comments
REVTeX 4, 5pp., 7 EPS figure files. N.B.: "Alec" is my first, and "Maassen van den Brink" my family name. v2: final published version, with changed title, different sample micrograph, and several clarifications