From: scerir (scerir@libero.it)
Date: Mon Dec 02 2002 - 01:26:05 MST
> I don't know enough about NMR to know whether or not that is
> a feasible assumption.
Quantum Physics, abstract
quant-ph/0208136
Date: Wed, 21 Aug 2002 18:50:24 GMT (247kb)
NMR molecular photography
Authors: Anatoly K. Khitrin, Vladimir L. Ermakov, B. M. Fung
Comments: 8 pages plus 3 figures, accepted for publication in the Journal of
Chemical Physics
A procedure is described for storing a 2D pattern consisting of 32x32 = 1024
bits in a spin state of a molecular system and then retrieving the stored
information as a stack of NMR spectra. The system used is a nematic liquid
crystal, the protons of which act as spin clusters with strong
intramolecular interactions. The technique used is a programmable
multi-frequency irradiation with low amplitude. When it is applied to the
liquid crystal, a large number of coherent long-lived 1H response signals
can be excited, resulting in a spectrum showing many sharp peaks with
controllable frequencies and amplitudes. The spectral resolution is enhanced
by using a second weak pulse with a 90 phase shift, so that the 1024 bits of
information can be retrieved as a set of well-resolved pseudo-2D spectra
reproducing the input pattern.
This archive was generated by hypermail 2.1.5 : Wed Jan 15 2003 - 17:58:32 MST