@article{f6a935fd335a4d71a3133ddbbbd6a7b6,
title = "Parity effect in a small superconducting grain: A rigorous result",
abstract = "The parity effect in an ultrasmall superconducting grain is examined. By applying a generalized version of Lieb{\textquoteright}s spin-reflection positivity technique, we show rigorously that the parity parameter (Formula presented) is nonvanishing in such a system. A positive lower bound for (Formula presented) is derived.",
author = "Tian, {Guang Shan} and Tang, {Lei Han}",
note = "One of us (G.S.T) would like to thank the Croucher Foundation for financial support and the Physics Department, Hong Kong Baptist University for their hospitality. This work was also partially supported by the Chinese National Science Foundation under Grant No. 19574002. ",
year = "1998",
doi = "10.1103/PhysRevB.58.12333",
language = "English",
volume = "58",
pages = "12333--12337",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "18",
}