Tunable coupling of superconducting qubits
介观与纳米尺度物理
2009-11-07 v3 超导电性
量子物理
摘要
We study an LC-circuit implemented using a current-biased Josephson junction (CBJJ) as a tunable coupler for superconducting qubits. By modulating the bias current, the junction can be tuned in and out of resonance and entangled with the qubits coupled to it. One can thus implement two-qubit operations by mediating entanglement. We consider the examples of CBJJ and charge--phase qubits. A simple recoupling scheme leads to a generalization to arbitrary qubit designs.
引用
@article{arxiv.cond-mat/0207112,
title = {Tunable coupling of superconducting qubits},
author = {Alexandre Blais and Alec Maassen van den Brink and A. M. Zagoskin},
journal= {arXiv preprint arXiv:cond-mat/0207112},
year = {2009}
}
备注
To appear in Phys. Rev. Lett., 3 figures