Spin-charge decoupling and the photoemission line-shape in one-dimensional insulators
Valeria Lante and Alberto Parola
The recent advances in angle-resolved photoemission techniques allowed the unambiguous experimental confirmation of spin-charge decoupling in quasi-one-dimensional (1D) Mott insulators. This opportunity stimulates a quantitative analysis of the spectral function A(k,omega) of prototypical one-dimens ... [Phys. Rev. B 80, 195113 (2009)] published Thu Nov 19, 2009.
Field-Induced Orbital Antiferromagnetism in Mott Insulators
K. A. Al-Hassanieh, C. D. Batista, G. Ortiz, and L. N. Bulaevskii
We report on a new electromagnetic phenomenon that emerges in Mott insulators. The phenomenon manifests as antiferromagnetic ordering due to orbital electric currents which are spontaneously generated from the coupling between spin currents and an external homogenous magnetic field. This novel spin- ... [Phys. Rev. Lett. 103, 216402 (2009)] published Thu Nov 19, 2009.
Fast update algorithm for the quantum Monte Carlo simulation of the Hubbard model
Phani K. V. V. Nukala, Thomas A. Maier, Michael S. Summers, Gonzalo Alvarez, and Thomas C. Schulthess
This paper presents an efficient algorithm for computing the transition probability in auxiliary field quantum Monte Carlo simulations of strongly correlated electron systems using a Hubbard model. This algorithm is based on a low rank updating of the underlying linear algebra problem, and results i ... [Phys. Rev. B 80, 195111 (2009)] published Tue Nov 17, 2009.
Evidence for Two Competing Order Parameters in Underdoped Cuprate Superconductors from a Model Analysis of Fermi-Arc Effects
Andres Greco
Preformed pairs above T and the two-gap scenarios are two main proposals for describing the low-doping pseudogap phase of high-T cuprates. Very recent angle-resolved photoemission experiments have shown features which were interpreted as evidence for preformed pairs. Here it is shown that those resu ... [Phys. Rev. Lett. 103, 217001 (2009)] published Tue Nov 17, 2009.
Dark Matter, Constrained Minimal Supersymmetric Standard Model, and Lattice QCD
Joel Giedt, Anthony W. Thomas, and Ross D. Young
Recent lattice measurements have given accurate estimates of the quark condensates in the proton. We use these results to significantly improve the dark matter predictions in benchmark models within the constrained minimal supersymmetric standard model. The predicted spin-independent cross sections ... [Phys. Rev. Lett. 103, 201802 (2009)] published Thu Nov 12, 2009.
Erratum: Axial nucleon and nucleon to Delta form factors and the Goldberger-Treiman relations from lattice QCD [Phys. Rev. D 76, 094511 (2007)]
C. Alexandrou, G. Koutsou, Th. Leontiou, J. W. Negele, and A. Tsapalis
Abstract not available. [Phys. Rev. D 80, 099901 (2009)] published Thu Nov 12, 2009.
Mott transitions in ternary flavor mixtures of ultracold fermions on optical lattices
E. V. Gorelik and N. Blumer
Ternary flavor mixtures of ultracold fermionic atoms in an optical lattice are studied in the case of equal repulsive on-site interactions U>0. The corresponding SU(3) invariant Hubbard model is solved numerically exactly within dynamical mean-field theory using multigrid Hirsch-Fye quantum Monte Ca ... [Phys. Rev. A 80, 051602 (2009)] published Wed Nov 11, 2009.
Solutions of [script P][script T]-symmetric tight-binding chain and its equivalent Hermitian counterpart
L. Jin and Z. Song
We study the non-Hermitian quantum mechanics for the discrete system. This paper gives an exact analytic single-particle solution for an N-site tight-binding chain with two conjugated imaginary potentials igamma at two end sites, which Hamiltonian has parity-time symmetry ([script P][script T] symme ... [Phys. Rev. A 80, 052107 (2009)] published Wed Nov 11, 2009.
Evolution of the coupling constant in SU(2) lattice gauge theory with two adjoint fermions
Ari J. Hietanen, Kari Rummukainen, and Kimmo Tuominen
We measure the evolution of the coupling constant using the Schrodinger functional method in the lattice formulation of SU(2) gauge theory with two massless Dirac fermions in the adjoint representation. We observe strong evidence for an infrared fixed point, where the theory becomes conformal. We me ... [Phys. Rev. D 80, 094504 (2009)] published Wed Nov 11, 2009.
Nucleon strangeness form factors from N=2+1 clover fermion lattice QCD
Takumi Doi, Mridupawan Deka, Shao-Jing Dong, Terrence Draper, Keh-Fei Liu et al. chiQCD Collaboration
We present the N=2+1 clover fermion lattice QCD calculation of the nucleon strangeness form factors. We evaluate disconnected insertions using the Z(4) stochastic method, along with unbiased subtractions from the hopping parameter expansion. We find that increasing the number of nucleon sources for ... [Phys. Rev. D 80, 094503 (2009)] published Tue Nov 10, 2009.
Pairing dynamics in strongly correlated superconductivity
B. Kyung, D. Senechal, and A.-M. S. Tremblay
Confirmation of the phononic origin of Cooper pair formation in superconductors came with the demonstration that the interaction was retarded and that the corresponding energy scales were associated with phonons. Using cellular dynamical mean-field theory for the two-dimensional Hubbard model, we id ... [Phys. Rev. B 80, 205109 (2009)] published Mon Nov 9, 2009.
Phase structure of thermal lattice QCD with N=2 twisted mass Wilson fermions
E.-M. Ilgenfritz, K. Jansen, M. P. Lombardo, M. Muller-Preussker, M. Petschlies et al.
We present numerical results for the phase diagram of lattice QCD at finite temperature in the formulation with twisted mass Wilson fermions and a tree-level Symanzik-improved gauge action. Our simulations are performed on lattices with temporal extent N=8, and lattice coupling beta ranging from str ... [Phys. Rev. D 80, 094502 (2009)] published Mon Nov 9, 2009.
Gribov's horizon and the ghost dressing function
Ph. Boucaud, J. P. Leroy, A. Le Yaouanc, J. Micheli, O. Pene et al.
We study a relation recently derived by K. Kondo at zero momentum between the Zwanziger's horizon function, the ghost dressing function and Kugo's functions u and w. We agree with this result as far as bare quantities are considered. However, assuming the validity of the horizon gap equation, we arg ... [Phys. Rev. D 80, 094501 (2009)] published Mon Nov 9, 2009.
Effective Coulomb interactions within BEDT-TTF dimers
Edan Scriven and B. J. Powell
We calculate the parameters for Hubbard models of kappa-(BEDT-TTF)X and beta-(BEDT-TTF)X. We use density-functional theory (DFT) to calculate the interactions between holes in dimers of the organic molecule bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) for 23 experimental geometries taken from a ... [Phys. Rev. B 80, 205107 (2009)] published Fri Nov 6, 2009.
Optical conductivity of a doped Mott insulator: The interplay between correlation and electron-phonon interaction
G. De Filippis, V. Cataudella, A. S. Mishchenko, C. A. Perroni, and N. Nagaosa
The optical conductivity (OC) of cuprates is studied theoretically in the low-density limit of the t-t-J model taking into account the hole-lattice coupling. By developing a limited phonon basis exact diagonalization method capable of treating the lattice of largest size ever considered (4 x 4), we ... [Phys. Rev. B 80, 195104 (2009)] published Wed Nov 4, 2009.
Integrable higher order deformations of Heisenberg supermagnetic model
Jia-Feng Guo, Shi-Kun Wang, Ke Wu, Zhao-Wen Yan, and Wei-Zhong Zhao
The Heisenberg supermagnet model is an integrable supersymmetric system and has a close relationship with the strong electron correlated Hubbard model. In this paper, we investigate the integrable higher order deformations of Heisenberg supermagnet models with two different constraints: (i) S=3S2I f ... [J. Math. Phys. 50, 113502 (2009)] published Tue Nov 3, 2009.
Contraction of fermionic operator circuits and the simulation of strongly correlated fermions
Thomas Barthel, Carlos Pineda, and Jens Eisert
A fermionic operator circuit is a product of fermionic operators of usually different and partially overlapping support. Further elements of fermionic operator circuits (FOCs) are partial traces and partial projections. The presented framework allows for the introduction of fermionic versions of kno ... [Phys. Rev. A 80, 042333 (2009)] published Fri Oct 30, 2009.
Fermionic multiscale entanglement renormalization ansatz
Philippe Corboz and Guifre Vidal
In a recent contribution [P. Corboz, G. Evenbly, F. Verstraete, and G. Vidal, arXiv:0904.4151 (unpublished)] entanglement renormalization was generalized to fermionic lattice systems in two spatial dimensions. Entanglement renormalization is a real-space coarse-graining transformation for lattice sy ... [Phys. Rev. B 80, 165129 (2009)] published Thu Oct 29, 2009.
Ruderman-Kittel-Kasuya-Yosida interactions on a bipartite lattice
J. E. Bunder and Hsiu-Hau Lin
Carrier-mediated exchange coupling, known as Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction, plays a fundamental role in itinerant ferromagnetism and has great application potentials in spintronics. A recent theorem based on the imaginary-time method shows that the oscillatory RKKY interaction bec ... [Phys. Rev. B 80, 153414 (2009)] published Thu Oct 29, 2009.
Erratum: Discerning Incompressible and Compressible Phases of Cold Atoms in Optical Lattices [Phys. Rev. Lett. 102, 135302 (2009)]
V. W. Scarola, L. Pollet, J. Oitmaa, and M. Troyer
Abstract not available. [Phys. Rev. Lett. 103, 189901 (2009)] published Thu Oct 29, 2009.
Exploration of SU(N) gauge theory with many Wilson fermions at strong coupling
Kei-ichi Nagai, Maria Georgina Carrillo-Ruiz, Gergana Koleva, and Randy Lewis
We explore aspects of the phase structure of SU(2) and SU(3) lattice gauge theories at strong coupling with many flavors N of Wilson fermions in the fundamental representation. The pseudoscalar meson mass as a function of hopping parameter is observed to deviate from the expected analytic dependence ... [Phys. Rev. D 80, 074508 (2009)] published Thu Oct 29, 2009.
Mixed action computations on fine dynamical lattices. (arXiv:0911.3756v1 [hep-lat])
ePrint arXiv http://arXiv.org/
f_B and f_Bs with maximally twisted Wilson fermions. (arXiv:0911.3757v1 [hep-lat])
ePrint arXiv http://arXiv.org/
Dimensionally regularized Polyakov loop correlators in hot QCD. (arXiv:0911.3480v1 [hep-ph] CROSS LISTED)
ePrint arXiv http://arXiv.org/
The three-quark static potential in perturbation theory. (arXiv:0911.3541v1 [hep-ph] CROSS LISTED)
ePrint arXiv http://arXiv.org/