Date: Thu, 25 Feb 10 01:00:17 GMT Subject: hep-lat daily 1 new + 1 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: hep-lat@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Tue 23 Feb 10 21:00:02 GMT to Wed 24 Feb 10 21:00:01 GMT ------------------------------------------------------------------------------ \\ arXiv:1002.4459 Date: Wed, 24 Feb 2010 03:17:09 GMT (508kb) Title: Study of QCD critical point using the canonical ensemble method Authors: Anyi Li Categories: hep-lat Comments: 17 pages, 11 figures. Plenary talk at 27th International Symposium on Lattice Field Theory (Lattice 2009), Beijing, China, 25-31 Jul 2009 \\ The existence of the QCD critical point at non-zero baryon density is not only of great interest for experimental physics but also a challenge for the theory. Any hint of the existence of the first order phase transition and, particularly, its critical point will be valuable towards a full understanding of the QCD phase diagram. We use lattice simulation based on the canonical ensemble method to explore the finite baryon density and finite temperature region and look for the QCD critical point. As a benchmark, we run simulations for the four degenerate flavor QCD where we observe a clear signal of the expected first order phase transition. In the two flavor case, we do not see any signal for temperatures as low as $0.83 \rm{T_c}$. Although our real world contains two light quarks and one heavier quark, three degenerate flavor case shares a lot of similar phase structures as the QCD. We scan the phase diagram using clover fermions with $m_\pi \approx 700{MeV}$ on $6^3\times4$ lattices. The baryon chemical potential is measured as we increase the baryon number and we see the characteristic "S-shape" that signals the first order phase transition. We determine the phase boundaries by Maxwell construction and report our preliminary results for the location of critical point for the present lattice. \\ ( http://arxiv.org/abs/1002.4459 , 508kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1002.4279 (*cross-listing*) Date: Tue, 23 Feb 2010 09:29:53 GMT (24kb) Title: On the non-ergodicity of the Swendsen-Wang-Kotecky algorithm on the kagome lattice Authors: Bojan Mohar and Jes\'us Salas Categories: cond-mat.stat-mech hep-lat math.CO Comments: Latex2e. 20 pages. Contains 11 figures using pstricks package. Uses iopart.sty \\ We prove that there are at least two Kempe equivalence classes for dual 3-edge-colourings of any triangulation T(3L,3L) of the torus with L>=1. This result implies in particular that the Wang-Swendsen-Kotecky algorithm for the zero-temperature 3-state Potts model on the kagome graph T'(3L,3L) [i.e., the medial graph of the triangulation T(3L,3L)] is not ergodic. \\ ( http://arxiv.org/abs/1002.4279 , 24kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1002.2988 replaced with revised version Wed, 24 Feb 2010 17:06:55 GMT (268kb) Title: Thermodynamics of lattice QCD with 2 flavours of colour-sextet quarks: A model of walking/conformal Technicolor Authors: J.B. Kogut and D.K. Sinclair Categories: hep-lat Comments: 21 pages, 9 figures, Revtex with postscript figures. One extra reference was added; text is unchanged. Corrected typographical error Report-no: ANL-HEP-PR-09-95 \\ ( http://arxiv.org/abs/1002.2988 , 268kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- For subscribe options to combined physics archives, e-mail To: physics@arXiv.org, Subject: subscribe ----------------------------------------------------------------------------- For help on viewing and making submissions, see http://arXiv.org/help/ For a list of archive mirror sites, see http://arXiv.org/servers.html ----------------------------------------------------------------------------- Third-party submissions cause excessive problems. Author self-submissions are exceedingly preferred. E-mail submissions have been discontinued in favor of better support for Web submissions. See http://arXiv.org/help/uploads