
Aug 14 2012
WITS Node Seminar: Prof FG Scholtz (NITheP Stellenbosch Node)
Good morning All,
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The National Institute for Theoretical Physics, and the Centre for Theoretical Physics, School of Physics, would like to invite to its coming talk in the theory seminar series, entitled:
"The entropy of dense noncommutative fermion gases"
to be presented by Prof F G Scholtz (National Institute for Theoretical Physics)
Abstract: We investigate the properties of two and threedimensional noncommutative fermion gases with fixed total zcomponent of angular momentum, $J_z$, and at high density for the simplest form of noncommutativity involving constant spatial commutators. Analytic expressions for the entropy and pressure are found. The entropy exhibits nonextensive behaviour while the pressure reveals the presence of incompressibility in two, but not in three dimensions. Remarkably, for two dimensional systems close to the incompressible density, the entropy is proportional to the square root of the system size, i.e., for such systems the number of microscopic degrees of freedom is determined by the circumference, rather than the area (size) of the system. From a commutative perspective these results can also be interpreted in terms of an effective excluded volume. Possible generalizations to three dimensions, which restore rotational symmetry, are briefly discussed.
Date: Tuesday, 14th August 2012
Venue: Frank Nabarro Lecture Theatre P216
Time: 13.20  14.10
I hope you shall all be able to attend,
Yours sincerely,
Alan S. Cornell
School of Physics
University of the Witwatersrand
Private Bag 3
Wits 2050
South Africa
Tel.:+27117176819
contact
 NITheP Stellenbosch node
 Rene Kotze
National Institute for Theoretical Physics
Private Bag X1
Matieland,
Stellenbosch, South Africa,7602  Phone: +27 (0)21 808 2653  Fax: +27 (0)218083862
 NITheP Gauteng node
 Paula Marais
Physical address: University of Witwatersrand
School of Physics
Jan Smuts Avenue
Braamfontein
JHB
 Phone: 27 (0)11 717 6898  Fax:
 NITheP KZN node
 Ms Nelisiwe Mncube
National Institute for Theoretical Physics
University of KwaZuluNatal
Private Bag x54001
Durban
4000
South Africa
 Phone: 27 (0)31 260 7570  Fax: 27 (0)31 260 8090
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