Quantum Ice: A Quantum Monte Carlo Study
Nic Shannon, Olga Sikora, Frank Pollmann, Karlo Penc, and Peter Fulde
Ice states, in which frustrated interactions lead to a macroscopic ground-state degeneracy, occur in water ice, in problems of frustrated charge order on the pyrochlore lattice, and in the family of rare-earth magnets collectively known as spin ice. Of particular interest at the moment are quantum s ... [Phys. Rev. Lett. 108, 067204 ] published .
Ghost-gluon coupling, power corrections, and Lambda from lattice QCD with a dynamical charm
B. Blossier, Ph. Boucaud, M. Brinet, F. De Soto, X. Du et al.
This paper is a first report on the determination of Lambda from lattice simulations with 2+1+1 twisted-mass dynamical flavors via the computation of the ghost-gluon coupling renormalized in the MOM Taylor scheme. We show this approach allows a very good control of the lattice artefacts and confirm ... [Phys. Rev. D 85, 034503 ] published .
On flavor symmetry in lattice quantum chromodynamics
El Hassan Saidi
Using a well established method to engineer non-abelian symmetries in superstring compactifications, we study the link between the point splitting method of Creutz et al. [PoS: Lattice 2010, 078 (2010) and JHEP 041, 1012 (2010)] for implementing flavor symmetry in lattice QCD; and singularity theo ... [J. Math. Phys. 53, 022302 (2012)] published Thu Feb 9, 2012.
Nonanalyticity in Scale in the Planar Limit of QCD
R. Lohmayer and H. Neuberger
Using methods of numerical lattice gauge theory we show that, in the limit of a large number of colors, properly regularized Wilson loops have an eigenvalue distribution which changes nonanalytically as the overall size of the loop is increased. This establishes a large-N phase transition in continu ... [Phys. Rev. Lett. 108, 061602 ] published .
Infrared Fixed Point of the 12-Fermion SU(3) Gauge Model Based on 2-Lattice Monte Carlo Renomalization-Group Matching
Anna Hasenfratz
I investigate an SU(3) gauge model with 12 fundamental fermions. The physically interesting region of this strongly coupled system can be influenced by an ultraviolet fixed point due to lattice artifacts. I suggest to use a gauge action with an additional negative adjoint plaquette term that lessens ... [Phys. Rev. Lett. 108, 061601 ] published .
Fast fits for lattice QCD correlators
K. Hornbostel, G. P. Lepage, C. T. H. Davies, R. J. Dowdall, H. Na et al. HPQCD collaboration
We illustrate a technique for fitting lattice QCD correlators to sums of exponentials that is significantly faster than traditional fitting methods1040 times faster for the realistic examples we present. Our examples are drawn from a recent analysis of the Upsilon spectrum, and another recent analys ... [Phys. Rev. D 85, 031504 ] published .
Ground-state phase diagram of the quantum JJ model on the honeycomb lattice
Fabio Mezzacapo and Massimo Boninsegni
We study the ground-state phase diagram of the quantum JJ model on the honeycomb lattice by means of an entangled-plaquette variational ansatz. Values of energy and relevant order parameters are computed in the range 0<=J/J<=1. The system displays classical order for J/J<~0.2 (Neel) and for J/J>~0.4 ... [Phys. Rev. B 85, 060402 ] published .
High-precision f and heavy quark effective theory from relativistic lattice QCD
C. McNeile, C. T. H. Davies, E. Follana, K. Hornbostel, and G. P. Lepage HPQCD Collaboration
We present a new determination of the B leptonic decay constant from lattice QCD simulations that use gluon configurations from MILC and a highly improved discretization of the relativistic quark action for both valence quarks. Our result, f=0.225(4) GeV, is almost 3 times more accurate than previo ... [Phys. Rev. D 85, 031503 ] published .
Landau gauge gluon and ghost propagators at finite temperature from quenched lattice QCD
R. Aouane, V. G. Bornyakov, E.-M. Ilgenfritz, V. K. Mitrjushkin, M. Muller-Preussker et al.
The behavior of the Landau gauge gluon and ghost propagators is studied in pure SU(3) gauge theory at nonzero temperature on the lattice. We concentrate on the momentum range (0.6, 2.0) GeV. For the longitudinal as well as for the transverse component of the gluon propagator we extract the continuum ... [Phys. Rev. D 85, 034501 ] published .
Publisher's Note: Helicity operators for mesons in flight on the lattice [Phys. Rev. D 85, 014507 (2012)]
Christopher E. Thomas, Robert G. Edwards, and Jozef J. Dudek
Abstract not available. [Phys. Rev. D 85, 039901 ] published .
Flavor corrections in the static potential in holographic QCD
Dimitrios Giataganas and Nikos Irges
We examine the static potential in the presence of flavors in the perturbative backreacted D4/D8 system from localized D8 branes, focusing, in particular, on the Sakai- Sugimoto model. For the case of long strings we find the flavor corrections to the static potential which are of exponential form. ... [Phys. Rev. D 85, 046001 ] published .
Heavy quark momentum diffusion coefficient from lattice QCD
Debasish Banerjee, Saumen Datta, Rajiv Gavai, and Pushan Majumdar
The momentum diffusion coefficient for heavy quarks is studied in a deconfined gluon plasma in the static approximation by investigating a correlation function of the color electric field using Monte Carlo techniques. The diffusion coefficient is extracted from the long-distance behavior of such a c ... [Phys. Rev. D 85, 014510 ] published .
Efficient implementation of the Gutzwiller variational method
Nicola Lanata, Hugo U. R. Strand, Xi Dai, and Bo Hellsing
We present a self-consistent numerical approach to solve the Gutzwiller variational problem for general multiband models with arbitrary on-site interaction. The proposed method generalizes and improves the procedure derived by Deng et al. [Phys. Rev. B 79, 075114 (2009)], overcoming the restriction ... [Phys. Rev. B 85, 035133 ] published .
Screened Coulomb interaction of localized electrons in solids from first principles
Bi-Ching Shih, Yubo Zhang, Wenqing Zhang, and Peihong Zhang
We report the implementation of a first-principles approach for calculating the screened Coulomb and exchange energies for localized electrons in solids. Our method is based on the pseudopotential plane-wave formalism. The localized orbitals are represented by maximally localized Wannier functions, ... [Phys. Rev. B 85, 045132 ] published .
Lattice approaches to dilute Fermi gases: Legacy of broken Galilean invariance
A. Privitera and M. Capone
In the dilute limit, the properties of fermionic lattice models with short-range attractive interactions converge to those of a dilute Fermi gas in continuum space. We investigate this connection using mean-field theory, and we show that the existence of finite lattice spacing has consequences down ... [Phys. Rev. A 85, 013640 ] published .
Sigma term and strangeness content of octet baryons
S. Durr, Z. Fodor, T. Hemmert, C. Hoelbling, J. Frison et al.
By using lattice QCD computations we determine the sigma terms and strangeness content of all octet baryons by means of an application of the Hellmann-Feynman theorem. In addition to polynomial and rational expressions for the quark-mass dependence of octet members, we use SU(3) covariant baryon chi ... [Phys. Rev. D 85, 014509 ] published .
Heavy-meson masses in the epsilon regime of heavy-meson chiral perturbation theory
Raul A. Briceno
The pseudoscalar and vector heavy-meson masses are calculated in the epsilon-regime of Heavy Meson Chiral Perturbation Theory to order epsilon. The results presented will allow the determination of low-energy coefficients (LECs) directly from Lattice QCD calculations of the heavy-mesons masses for l ... [Phys. Rev. D 85, 014508 ] published .
General mechanism for orbital selective phase transitions
Yu-Zhong Zhang, Hunpyo Lee, Hai-Qing Lin, Chang-Qin Wu, Harald O. Jeschke et al.
Based on the analysis of a two-orbital Hubbard model within a mean-field approach, we propose a mechanism for an orbital selective phase transition (OSPT) where coexistence of localized and itinerant electrons can be realized. We show that this OSPT exists both at and near half-filling even in the a ... [Phys. Rev. B 85, 035123 ] published .
Topological Quantum Liquids with Quaternion Non-Abelian Statistics
Cenke Xu and Andreas W. W. Ludwig
Noncollinear magnetic order is typically characterized by a tetrad ground state manifold (GSM) of three perpendicular vectors or nematic directors. We study three types of tetrad orders in two spatial dimensions, whose GSMs are SO(3)=S/Z, S/Z, and S/Q, respectively. Q denotes the non-Abelian quatern ... [Phys. Rev. Lett. 108, 047202 ] published .
Topological Order and Semions in a Strongly Correlated Quantum Spin Hall Insulator
Andreas Ruegg and Gregory A. Fiete
We provide a self-consistent mean-field framework to study the effect of strong interactions in a quantum spin Hall insulator on the honeycomb lattice. We identify an exotic phase for large spin-orbit coupling and intermediate Hubbard interaction. This phase is gapped and does not break any symmetry ... [Phys. Rev. Lett. 108, 046401 ] published .
Fermion condensates and Lorentz symmetry breaking in strongly coupled large N gauge theories
E. T. Tomboulis
The possibility of Lorentz symmetry breaking (LSB) has attracted considerable attention in recent years. Spontaneous LSB, in particular, offers the attractive prospect of the graviton as a Nambu-Goldstone boson. Here we consider the question of spontaneous LSB in lattice gauge theories via formation ... [Phys. Rev. D 85, 024042 ] published .
Numerical properties of staggered quarks with a taste-dependent mass term. (arXiv:1202.1867v1 [hep-lat])
ePrint arXiv http://arXiv.org/
The No-Pole Condition in Landau gauge: Properties of the Gribov Ghost Form-Factor and a Constraint on the 2d Gluon Propagator. (arXiv:1202.1912v1 [hep-th])
ePrint arXiv http://arXiv.org/
The Lorentz-invariant boundary action of the confining string and its universal contribution to the inter-quark potential. (arXiv:1202.1984v1 [hep-th])
ePrint arXiv http://arXiv.org/
Lattice formulation of two-dimensional N=(2,2) super Yang-Mills with SU(N) gauge group. (arXiv:1202.2101v1 [hep-lat])
ePrint arXiv http://arXiv.org/
Density of states and Fisher's zeros in compact U(1) pure gauge theory. (arXiv:1202.2109v1 [hep-lat])
ePrint arXiv http://arXiv.org/
New numerical results and novel effective string predictions for Wilson loops. (arXiv:1107.4356v2 [hep-th] UPDATED)
ePrint arXiv http://arXiv.org/
Confinement: a real-time visualization. (arXiv:1111.0275v2 [cond-mat.str-el] UPDATED)
ePrint arXiv http://arXiv.org/
Semileptonic form factor ratio B_s->D_s/B->D and its application to BR(B^0_s->\mu^+\mu^-). (arXiv:1111.1796v2 [hep-lat] UPDATED)
ePrint arXiv http://arXiv.org/
The scalar gluonium correlator: large-beta_0 and beyond. (arXiv:1202.1169v1 [hep-ph] CROSS LISTED)
ePrint arXiv http://arXiv.org/
Revisiting Scalar and Pseudoscalar Couplings with Nucleons. (arXiv:1202.1292v1 [hep-ph] CROSS LISTED)
ePrint arXiv http://arXiv.org/