Josephson-phase qubit without tunneling
介观与纳米尺度物理
2009-11-07 v3 超导电性
量子物理
摘要
We show that a complete set of one-bit gates can be realized by coupling the two logical states of a phase qubit to a third level (at higher energy) using microwave pulses. Thus, one can achieve coherent control without invoking any tunneling between the qubit levels. We propose two implementations, using rf-SQUIDs and d-wave Josephson junctions.
引用
@article{arxiv.cond-mat/0211638,
title = {Josephson-phase qubit without tunneling},
author = {M. H. S. Amin and A. Yu. Smirnov and Alec Maassen van den Brink},
journal= {arXiv preprint arXiv:cond-mat/0211638},
year = {2009}
}
备注
REVTeX4, 4pp., 6 EPS figure files; N.B.: "Alec" is my first, and "Maassen van den Brink" my family name. v2: gate universality fleshed out, small fix in d-wave decoherence para, discussion expanded, two Refs. added. v3: some more Refs., a molecular example, and a few minor fixes; final, to appear in PRB Rapids