Wilson Fermions, Random Matrix Theory and the Aoki Phase

Akemann G, Damgaard PH, Splittorff K, Verbaarschot JJM (2010)
In: PoS (Lattice 2010)., 92. .

Download
Es wurde kein Volltext hochgeladen. Nur Publikationsnachweis!
Konferenzbeitrag | Veröffentlicht | Englisch
Autor
; ; ;
Abstract / Bemerkung
The QCD partition function for the Wilson Dirac operator, $D_W$, at nonzerolattice spacing $a$ can be expressed in terms of a chiral Lagrangian as asystematic expansion in the quark mass, the momentum and $a^2$. Starting fromthis chiral Lagrangian we obtain an analytical expression for the spectraldensity of $\gamma_5 (D_W+m)$ in the microscopic domain. It is shown that the$\gamma_5$-Hermiticity of the Dirac operator necessarily leads to a coefficientof the $a^2$ term that is consistent with the existence of an Aoki phase. Thetransition to the Aoki phase is explained, and the interplay of the index of$D_W$ and nonzero $a$ is discussed. We formulate a random matrix theory for theWilson Dirac operator with index $\nu$ (which, in the continuum limit, becomesequal to the topological charge of gauge field configurations). It is shown byan explicit calculation that this random matrix theory reproduces the$a^2$-dependence of the chiral Lagrangian in the microscopic domain, and thatthe sign of the $a^2$-term is directly related to the $\gamma_5$-Hermiticity of$D_W$.
Erscheinungsjahr
Titel des Konferenzbandes
PoS (Lattice 2010)
Band
92
Konferenz
The XXVIII International Symposium on Lattice Field Theory, Lattice2010
Konferenzort
Villasimius, Italy
Konferenzdatum
2010-06-14
ISSN
PUB-ID

Zitieren

Akemann G, Damgaard PH, Splittorff K, Verbaarschot JJM. Wilson Fermions, Random Matrix Theory and the Aoki Phase. In: PoS (Lattice 2010). Vol 92. 2010.
Akemann, G., Damgaard, P. H., Splittorff, K., & Verbaarschot, J. J. M. (2010). Wilson Fermions, Random Matrix Theory and the Aoki Phase. PoS (Lattice 2010), 92
Akemann, G., Damgaard, P. H., Splittorff, K., and Verbaarschot, J. J. M. (2010). “Wilson Fermions, Random Matrix Theory and the Aoki Phase” in PoS (Lattice 2010), vol. 92,.
Akemann, G., et al., 2010. Wilson Fermions, Random Matrix Theory and the Aoki Phase. In PoS (Lattice 2010). no.92
G. Akemann, et al., “Wilson Fermions, Random Matrix Theory and the Aoki Phase”, PoS (Lattice 2010), vol. 92, 2010.
Akemann, G., Damgaard, P.H., Splittorff, K., Verbaarschot, J.J.M.: Wilson Fermions, Random Matrix Theory and the Aoki Phase. PoS (Lattice 2010). 92, (2010).
Akemann, Gernot, Damgaard, P. H., Splittorff, K., and Verbaarschot, J. J. M. “Wilson Fermions, Random Matrix Theory and the Aoki Phase”. PoS (Lattice 2010). 2010.Vol. 92.

Export

Markieren/ Markierung löschen
Markierte Publikationen

Open Data PUB

Quellen

arXiv: 1011.5118

Suchen in

Google Scholar