[Wien] Energy origin

[Laurence Marks]

Slightly confused:
1) Integral of rho*c vanishes only if integral of rho vanishes.....?
2) What about for a not charge neutral system?

On 10/27/06, John Pask <pask1 at llnl.gov> wrote:
>
> > Is this true independent of whether one has a charged or a charge
> > neutral system?
>
> This is true for any neutral system: integral of rho*V equals integral of
> rho*(V+c) since integral of rho*c vanishes for any constant c.
>
> John
>
> > On 10/27/06, John Pask <pask1 at llnl.gov> wrote:
> > >
> > > Dear Laurence,
> > >
> > > Whereas the potential is unique only up to an arbitrary constant, the
> > > total energy (per unit cell) in a periodic solid is well defined -- i.e.,
> > > no arbitrary constant. (Shifts in the potential cancel out in the Coulomb
> > > integrals.)
> > >
> > > John
> > >
> > > On Thu, 26 Oct 2006, Laurence Marks wrote:
> > >
> > > > Does anyone know of any good sources for understanding exactly what
> > > > the energy origin is in Wien?
> > > >
> > >
> > > --
> > > --------------------------------------
> > > John E. Pask
> > > Physicist
> > > Lawrence Livermore National Laboratory
> > > University of California
> > > P.O. Box 808, L-045
> > > Livermore, CA 94551 USA
> > > http://www-phys.llnl.gov/Research/Metals_Alloys/People/Pask/
> > >
> > > _______________________________________________
> > > Wien mailing list
> > > Wien at zeus.theochem.tuwien.ac.at
> > > http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
> > >
> >
> >
> >
>
> --
> --------------------------------------
> John E. Pask
> Physicist
> Lawrence Livermore National Laboratory
> University of California
> P.O. Box 808, L-045
> Livermore, CA 94551 USA
> phone/fax: +1 (925) 422-8392/2851
> pask1 at llnl.gov
>
> _______________________________________________
> Wien mailing list
> Wien at zeus.theochem.tuwien.ac.at
> http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
>


-- 
Laurence Marks
Department of Materials Science and Engineering
MSE Rm 2036 Cook Hall
2220 N Campus Drive
Northwestern University
Evanston, IL 60208, USA
Tel: (847) 491-3996 Fax: (847) 491-7820
email: L-marks at northwestern dot edu
http://www.numis.northwestern.edu