Comment on "Quantum Phase Slips and Transport in Ultrathin Superconducting Wires"
Abstract
In a recent Letter (Phys. Rev. Lett.78, 1552 (1997) ), Zaikin, Golubev, van Otterlo, and Zimanyi criticized the phenomenological time-dependent Ginzburg-Laudau model which I used to study the quantum phase-slippage rate for superconducting wires. They claimed that they developed a "microscopic" model, made qualitative improvement on my overestimate of the tunnelling barrier due to electromagnetic field. In this comment, I want to point out that, i), ZGVZ's result on EM barrier is expected in my paper; ii), their work is also phenomenological; iii), their renormalization scheme is fundamentally flawed; iv), they underestimated the barrier for ultrathin wires; v), their comparison with experiments is incorrect.
Keywords
Cite
@article{arxiv.cond-mat/9702231,
title = {Comment on "Quantum Phase Slips and Transport in Ultrathin Superconducting Wires"},
author = {Ji-Min Duan},
journal= {arXiv preprint arXiv:cond-mat/9702231},
year = {2009}
}
Comments
Substantial changes made. Zaikin et al's main result was expected from my work. They underestimated tunneling barrier for ultrathin wires by one order of magnitude in the exponent