[14245] in cryptography@c2.net mail archive
Re: quantum hype
daemon@ATHENA.MIT.EDU (Peter Fairbrother)
Mon Sep 22 22:41:34 2003
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Tue, 23 Sep 2003 00:38:26 +0100
From: Peter Fairbrother <zenadsl6186@zen.co.uk>
To: Matt Crawford <crawdad@fnal.gov>, <cryptography@metzdowd.com>
In-Reply-To: <26CD8C35-ED48-11D7-8575-000A95A0BF96@fnal.gov>
Matt Crawford wrote:
>> BTW, you can decrease the wavelength of a photon by bouncing it off
>> moving
>> mirrors.
>
> Sure. To double the energy (halve the wavelength), move the mirror at
> 70% of the speed of light. And since you don't know exactly when the
> photon is coming, keep it moving at that speed ...
>
I never suggested it was very practical, but:
Trap it in a cavity between two parallel mirrors, and shrink the cavity. It
doesn't matter (within reason) how fast you shrink it, just how much.
:)
--
Peter Fairbrother
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