Comment on "Quantum Phase Slips and Transport in Ultrathin Superconducting Wires"

Details Comment on "Quantum Phase Slips and Transport in Ultrathin Superconducting Wires" Comment on "Quantum Phase Slips and Transport in Ultrathin Superconducting Wires"

1997-02-26

arxiv.org/abs/cond-mat/9702231v2

Physics

Condensed Matter

Substantial changes made. Zaikin et al's main result was expected from my work. They underestimated tunneling barrier for ultr

Scientific paper

10.1103/PhysRevLett.79.3316

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.

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