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From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.rumor,net.chess,net.arch
Subject: Re: Ballistic transistors, the Belle II chess machine, & Seymour Cray
Message-ID: <9255@brl-tgr.ARPA>
Date: Fri, 15-Mar-85 14:58:18 EST
Article-I.D.: brl-tgr.9255
Posted: Fri Mar 15 14:58:18 1985
Date-Received: Sun, 17-Mar-85 00:27:37 EST
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Organization: Ballistic Research Lab
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Xref: watmath net.rumor:689 net.chess:819 net.arch:989

> > >  Of course, the ballistic gate speeds (100 femtosecond range) ...
> >
> > about 10 picoseconds delay per gate ...
> 
> Nope.  Try Josephson junctions.  Gate delays less than 10ps ...

"About 10ps" is compatible with that and both are far from 100fs.

IBM was working on Josephson junctions when I was a youngster.
What is the holdup?