Phase diagram of the disordered Bose-Hubbard model (2009)
Gurarie, V., Pollet, L., Prokof'ev, N. V., Svistunov, B. V., Troyer, M.
We establish the phase diagram of the disordered three-dimensional Bose-Hubbard model at unity filling, which has been controversial for many years. The theorem of inclusions, proven in Ref. [1],...
Diagrammatic Monte Carlo for the Hubbard Model (2009)
Kozik, E., Van Houcke, K., Gull, E., Pollet, L., Prokof'ev, N., Svistunov, B., ...
We show that Monte Carlo sampling of the Feynman diagrammatic series (DiagMC) can be used for tackling hard fermionic quantum many-body problems in the thermodynamic limit by presenting accurate...
Supersolid phase with cold polar molecules on a triangular lattice (2009)
Pollet, L., Picon, J. D., Buechler, H. P., Troyer, M.
We study a system of heteronuclear molecules on a triangular lattice and analyze the potential of this system for the experimental realization of a supersolid phase. The ground state phase diagram...
Trotzky, S., Pollet, L., Gerbier, F., Schnorrberger, U., Bloch, I., Prokof'ev, N. V., ...
Ultracold atomic gases in optical lattices have proven to be a controllable, tunable and clean implementation of strongly interacting quantum many-body systems. An essential prospect for such quantum...
Absence of a Direct Superfluid to Mott Insulator Transition in Disordered Bose Systems (2009)
Pollet, L., Prokof'ev, N. V., Svistunov, B. V., Troyer, M.
We prove the absence of a direct quantum phase transition between a superfluid and a Mott insulator in a bosonic system with generic, bounded disorder. We also prove compressibility of the system on...
Distinguishing Phases with Ansatz Wavefunctions (2009)
Bauer, B., Scarola, V. W., Troyer, M., Whaley, K. B.
We propose an indistinguishability measure for assessment of ansatz wavefunctions with numerically determined wavefunctions. The measure efficiently compares all correlation functions of two states...
Discerning Incompressible and Compressible Phases of Cold Atoms in Optical Lattices (2008)
Scarola, V. W., Pollet, L., Oitmaa, J., Troyer, M.
Experiments with cold atoms trapped in optical lattices offer the potential to realize a variety of novel phases but suffer from severe spatial inhomogeneity that can obscure signatures of new phases...
Expansion of a quantum gas released from an optical lattice (2008)
Gerbier, F., Trotzky, S., Foelling, S., Schnorrberger, U., Thompson, J. D., Widera, A., ...
We analyze the interference pattern produced by ultracold atoms released from an optical lattice. Such interference patterns are commonly interpreted as the momentum distributions of the trapped...
Thermal Canting of Spin-Bond Order (2008)
Scarola, V. W., Whaley, K. B., Troyer, M.
Magnetism arising from coupled spin and spatial degrees of freedom underlies the properties of a broad array of physical systems. We study here the interplay between correlations in spin and space...
Binding of a 3He impurity to a screw dislocation in solid 4He (2008)
Corboz, P., Pollet, L., Prokof'ev, N. V., Troyer, M.
Using first-principle simulations for the probability density of finding a 3He atom in the vicinity of the screw dislocation in solid 4He, we determine the binding energy to the dislocation nucleus...
Mechanisms for Spin-Supersolidity in S=1/2 Spin-Dimer Antiferromagnets (2008)
Albuquerque, A. F., Schmidt, K. P., Laflorencie, N., Troyer, M., Mila, F.
Using perturbative expansions and the contractor renormalization (CORE) algorithm, we obtain effective hard-core bosonic Hamiltonians describing the low-energy physics of $S=1/2$ spin-dimer...
Phase diagram of 4He adsorbed on graphite (2008)
Corboz, P., Boninsegni, M., Pollet, L., Troyer, M.
We present results of a theoretical study of 4He films adsorbed on graphite, based on the continuous space worm algorithm. In the first layer, we find a domain-wall phase and a (7/16) registered...
Search for Deconfined Criticality: SU(2) D\'{e}j\`{a} Vu (2008)
Kuklov, A. B., Matsumoto, M., Prokof'ev, N. V., Svistunov, B. V., Troyer, M.
Monte Carlo simulations of the SU(2)-symmetric deconfined critical point action reveal strong violations of scale invariance for the deconfinement transition. We find compelling evidence that the...
Local stress and superfluid properties of solid Helium-4 (2008)
Pollet, L., Boninsegni, M., Kuklov, A. B., Prokofev, N. V., Svistunov, B. V., Troyer, M.
More than half a century ago Penrose asked: are the superfluid and solid state of matter mutually exclusive or do there exist "supersolid" materials where the atoms form a regular lattice and...
A RENORMALIZATION APPROACH TO SIMULATIONS OF QUANTUM EFFECTS IN NANOSCALE MAGNETIC SYSTEMS ∗ (2008)
S. Wessel, S. Trebst, M. Troyer
Abstract. Simulation of the dynamics of nanoscale systems are usually restricted to a purely classical description, which becomes inadequate once technological minimization reaches scales on which...
A. Dorneich, E. Arrigoni, W. Hanke, M. Troyer, Shoucheng Zhang, Horst Rollnik, ...
Permission to make digital or hard copies of portions of this work for personal or classroom use is granted provided that the copies are not made or distributed for profit or commercial advantage and...
The ALPS project release 1.3: open source software for strongly correlated systems (2008)
Albuquerque, A. F., Alet, F., Corboz, P., Dayal, P., Feiguin, A., Fuchs, S., ...
We present release 1.3 of the ALPS (Algorithms and Libraries for Physics Simulations) project, an international open source software project to develop libraries and application programs for the...
May, C., Troyer, M., Ensslin, K.
We calculate the electronic width of quantum wires as a function of their lithographic width in analogy to experiments performed on nanostructures defined by local oxidation of Ga[Al]As...
Corboz, P., Kleine, A., Assaad, F. F., McCulloch, I. P., Schollwöck, U., Troyer, M.
Gaussian Quantum Monte Carlo (GQMC) is a stochastic phase space method for fermions with positive weights. In the example of the Hubbard model close to half filling it fails to reproduce all the...
Luttinger Liquid in the Core of Screw Dislocation in Helium-4 (2007)
Boninsegni, M., Kuklov, A. B., Pollet, L., Prokof'ev, N. V., Svistunov, B. V., Troyer, M.
On the basis of first-principle Monte Carlo simulations we find that the screw dislocation along the hexagonal axis of an hcp He4 crystal features a superfluid core. This is the first example of a...
Superfluidity of Grain Boundaries in Solid Helium-4 (2007)
Pollet, L., Boninsegni, M., Kuklov, A. B., Prokof'ev, N. V., Svistunov, B. V., Troyer, M.
By large-scale quantum Monte Carlo simulations we show that grain boundaries in Helium-4 crystals are generically superfluid at low temperature, with a transition temperature of the order of ~0.5K at...
Quantum Monte Carlo study of a 1D phase-fluctuating condensate (2007)
Gils, C., Pollet, L., Vernier, A., Hebert, F., Batrouni, G. G., Troyer, M.
We study numerically the low temperature behaviour of a 1D Bose gas trapped in an optical lattice. For a sufficient number of particles and weak repulsive interactions, we find a clear regime of...
Quantum Monte Carlo study of a one-dimensional phase-fluctuating condensate (2007)
Gils, C., Pollet, L., Vernier, A., Hebert, F., Batrouni, G. G., Troyer, M.
We study numerically the low temperature behavior of a one-dimensional Bose gas trapped in an optical lattice. For a sufficient number of particles and weak repulsive interactions, we find a clear...
Ensemble Optimization Techniques for the Simulation of Slowly Equilibrating Systems (2006)
Trebst, S., Huse, D. A., Gull, E., Katzgraber, H. G., Hansmann, U. H. E., Troyer, M.
Competing phases or interactions in complex many-particle systems can result in free energy barriers that strongly suppress thermal equilibration. Here we discuss how extended ensemble Monte Carlo...
Feedback-optimized parallel tempering Monte Carlo (2006)
Katzgraber, H G, Trebst, S, Huse, D A, Troyer, M
We introduce an algorithm for systematically improving the efficiency of parallel tempering Monte Carlo simulations by optimizing the simulated temperature set. Our approach is closely related to a...
Mott Domains of Bosons Confined on Optical Lattices (2006)
Batrouni, G. G., Rousseau, V., Scalettar, R. T., Rigol, M., Muramatsu, A., Denteneer, P. J. H., ...
In the absence of a confining potential, the boson Hubbard model in its ground state is known to exhibit a superfluid to Mott insulator quantum phase transition at commensurate fillings and strong...
Optimized parallel tempering simulations of proteins (2006)
Trebst, S., Troyer, M., Hansmann, U. H. E.
This version is available at the following Publisher URL: http://jcp.aip.org
Neel Temperature of Quasi-Low-Dimensional Heisenberg Antiferromagnets (2005)
Yasuda, C., Todo, S., Hukushima, K., Alet, F., Keller, M., Troyer, M., ...
The N\\\'eel temperature, $T_{\\rm N}$, of quasi-one- and quasi-two-dimensional antiferromagnetic Heisenberg models on a cubic lattice is calculated by Monte Carlo simulations as a function of...
The ALPS project: open source software for strongly correlated systems (2005)
Alet, F., Dayal, P., Grzesik, A., Honecker, A., Koerner, M., Laeuchli, A., ...
We present the ALPS (Algorithms and Libraries for Physics Simulations) project, an international open source software project to develop libraries and application programs for the simulation of...
Bosons in optical lattices - from the Mott transition to the Tonks-Girardeau gas (2005)
Wessel, S., Alet, F., Trebst, S., Leumann, D., Troyer, M., Batrouni, G. George
We present results from quantum Monte Carlo simulations of trapped bosons in optical lattices, focusing on the crossover from a gas of softcore bosons to a Tonks-Girardeau gas in a one-dimensional...
Non-local updates for quantum Monte Carlo simulations (2005)
Troyer, M., Alet, F., Trebst, S., Wessel, S.
We review the development of update schemes for quantum lattice models simulated using world line quantum Monte Carlo algorithms. Starting from the Suzuki-Trotter mapping we discuss limitations of...
Symmetry projection schemes for Gaussian Monte Carlo methods (2005)
Assaad, F. F., Werner, P., Corboz, P., Gull, E., Troyer, M.
A novel sign-free Monte Carlo method for the Hubbard model has recently been proposed by Corney and Drummond. High precision measurements on small clusters show that ground state correlation...
Two Step Restoration of SU(2) Symmetry in a Frustrated Quantum Magnet (2005)
Laeuchli, A., Domenge, J. C., Lhuillier, C., Sindzingre, P., Troyer, M.
We demonstrate the existence of a spin-nematic, moment-free phase in a quantum four-spin ring exchange model on the square lattice. This unusual quantum state is created by the interplay of...
Neel Temperature of Quasi-Low-Dimensional Heisenberg Antiferromagnets (2005)
Yasuda, C., Todo, S., Hukushima, K., Alet, F., Keller, M., Troyer, M., ...
The N\\\'eel temperature, $T_{\\rm N}$, of quasi-one- and quasi-two-dimensional antiferromagnetic Heisenberg models on a cubic lattice is calculated by Monte Carlo simulations as a function of...
Neel Temperature of Quasi-Low-Dimensional Heisenberg Antiferromagnets (2005)
Yasuda, C., Todo, S., Hukushima, K., Alet, F., Keller, M., Troyer, M., ...
The N\\\'eel temperature, $T_{\\rm N}$, of quasi-one- and quasi-two-dimensional antiferromagnetic Heisenberg models on a cubic lattice is calculated by Monte Carlo simulations as a function of...
Two Step Restoration of SU(2) Symmetry in a Frustrated Ring-Exchange Magnet (2004)
Laeuchli, A., Domenge, J. C., Lhuillier, C., Sindzingre, P., Troyer, M.
We demonstrate the existence of a spin-nematic, moment-free phase in a quantum four-spin ring exchange model on the square lattice. This unusual quantum state is created by the interplay of...
Bosons in optical lattices - from the Mott transition to the Tonks-Girardeau gas (2004)
Wessel, S., Alet, F., Trebst, S., Leumann, D., Troyer, M., Batrouni, G. George
We present results from quantum Monte Carlo simulations of trapped bosons in optical lattices, focusing on the crossover from a gas of softcore bosons to a Tonks-Girardeau gas in a one-dimensional...
The ALPS project: open source software for strongly correlated systems (2004)
Alet, F., Dayal, P., Grzesik, A., Honecker, A., Koerner, M., Laeuchli, A., ...
We present the ALPS (Algorithms and Libraries for Physics Simulations) project, an international open source software project to develop libraries and application programs for the simulation of...
Alder, S., Trebst, S., Hartmann, A. K., Troyer, M.
We investigate the performance of flat-histogram methods based on a multicanonical ensemble and the Wang-Landau algorithm for the three-dimensional +/- J spin glass by measuring round-trip times in...
The ALPS project: open source software for strongly correlated systems (2004)
Alet, F., Dayal, P., Grzesik, A., Honecker, A., Koerner, M., Laeuchli, A., ...
We present the ALPS (Algorithms and Libraries for Physics Simulations) project, an international open source software project to develop libraries and application programs for the simulation of...
Bosons in optical lattices - from the Mott transition to the Tonks-Girardeau gas (2004)
Wessel, S., Alet, F., Trebst, S., Leumann, D., Troyer, M., Batrouni, G. George
We present results from quantum Monte Carlo simulations of trapped bosons in optical lattices, focusing on the crossover from a gas of softcore bosons to a Tonks-Girardeau gas in a one-dimensional...
Two Step Restoration of SU(2) Symmetry in a Frustrated Quantum Magnet (2004)
Laeuchli, A., Domenge, J. C., Lhuillier, C., Sindzingre, P., Troyer, M.
We demonstrate the existence of a spin-nematic, moment-free phase in a quantum four-spin ring exchange model on the square lattice. This unusual quantum state is created by the interplay of...
The ALPS project: open source software for strongly correlated systems (2004)
Alet, F., Dayal, P., Grzesik, A., Honecker, A., Koerner, M., Laeuchli, A., ...
We present the ALPS (Algorithms and Libraries for Physics Simulations) project, an international open source software project to develop libraries and application programs for the simulation of...
Bosons in optical lattices - from the Mott transition to the Tonks-Girardeau gas (2004)
Wessel, S., Alet, F., Trebst, S., Leumann, D., Troyer, M., Batrouni, G. George
We present results from quantum Monte Carlo simulations of trapped bosons in optical lattices, focusing on the crossover from a gas of softcore bosons to a Tonks-Girardeau gas in a one-dimensional...
Two Step Restoration of SU(2) Symmetry in a Frustrated Quantum Magnet (2004)
Laeuchli, A., Domenge, J. C., Lhuillier, C., Sindzingre, P., Troyer, M.
We demonstrate the existence of a spin-nematic, moment-free phase in a quantum four-spin ring exchange model on the square lattice. This unusual quantum state is created by the interplay of...
Neel Temperature of Quasi-Low-Dimensional Heisenberg Antiferromagnets (2003)
Yasuda, C., Todo, S., Hukushima, K., Alet, F., Keller, M., Troyer, M., ...
The N\'eel temperature, $T_{\rm N}$, of quasi-one- and quasi-two-dimensional antiferromagnetic Heisenberg models on a cubic lattice is calculated by Monte Carlo simulations as a function of...
Non-local updates for quantum Monte Carlo simulations (2003)
Troyer, M., Alet, F., Trebst, S., Wessel, S.
We review the development of update schemes for quantum lattice models simulated using world line quantum Monte Carlo algorithms. Starting from the Suzuki-Trotter mapping we discuss limitations of...
Performance Limitations of Flat Histogram Methods and Optimality of Wang-Landau Sampling (2003)
Dayal, P., Trebst, S., Wessel, S., Wuertz, D., Troyer, M., Sabhapandit, S., ...
We determine the optimal scaling of local-update flat-histogram methods with system size by using a perfect flat-histogram scheme based on the exact density of states of 2D Ising models.The typical...
Non-local updates for quantum Monte Carlo simulations (2003)
Troyer, M., Alet, F., Trebst, S., Wessel, S.
We review the development of update schemes for quantum lattice models simulated using world line quantum Monte Carlo algorithms. Starting from the Suzuki-Trotter mapping we discuss limitations of...
Non-local updates for quantum Monte Carlo simulations (2003)
Troyer, M., Alet, F., Trebst, S., Wessel, S.
We review the development of update schemes for quantum lattice models simulated using world line quantum Monte Carlo algorithms. Starting from the Suzuki-Trotter mapping we discuss limitations of...
Broken time-reversal symmetry in strongly correlated ladder structures (2003)
Schollwöck, U., Chakravarty, S., Fjærestad, J. O., Marston, J. B., Troyer, M.
Broken time-reversal symmetry in strongly correlated ladder structures (2003)
Schollwock, U., Chakravarty, S., Fjaerestad, J. O., Marston, J. B., Troyer, M.
We provide, for the first time, in a doped strongly correlated system (two-leg ladder), a controlled theoretical demonstration of the existence of a state in which long-range ordered orbital currents...
Broken time-reversal symmetry in strongly correlated ladder structures (2003)
Schollwock, U., Chakravarty, S., Fjaerestad, J. O., Marston, J. B., Troyer, M.
We provide, for the first time, in a doped strongly correlated system (two-leg ladder), a controlled theoretical demonstration of the existence of a state in which long-range ordered orbital currents...
Broken time-reversal symmetry in strongly correlated ladder structures (2002)
Schollwoeck, U., Chakravarty, Sudip, Fjaerestad, J. O., Marston, J. B., Troyer, M.
We provide, for the first time, in a doped strongly correlated system (two-leg ladder), a controlled theoretical demonstration of the existence of a state in which long-range ordered orbital currents...
Phase Diagram of a Spin Ladder with Cyclic Four Spin Exchange (2002)
Laeuchli, A., Schmid, G., Troyer, M.
We present the phase diagram of the $S=1/2$ Heisenberg model on the two leg ladder with cyclic four spin exchange, determined by a combination of Exact Diagonalization and Density Matrix...
Bernardet, K., Batrouni, G. G., Troyer, M., Dorneich, A.
We use quantum Monte Carlo simulations to study the effect of disorder, in the form of a disordered chemical potential, on the phase diagram of the hard core bosonic Hubbard model in two dimensions....
Mott Domains of Bosons Confined on Optical Lattices (2002)
Batrouni, G. G., Rousseau, V., Scalettar, R. T., Rigol, M., Muramatsu, A., Denteneer, P. J. H., ...
In the absence of a confining potential, the boson Hubbard model in its ground state is known to exhibit a superfluid to Mott insulator quantum phase transition at commensurate fillings and strong...
Interaction of vortices in superconductors with kappa close to 2^(-1/2) (2002)
Mohamed, F., Luk'yanchuk, I., Troyer, M., Blatter, G.
Using a perturbative approach to the infinitely degenerate Bogomolnyi vortex state for a superconductor with kappa = 2^(-1/2), T -> T_c, we calculate the interaction of vortices in a superconductor...
Mott Domains of Bosons Confined on Optical Lattices (2002)
Batrouni, G. G., Rousseau, V., Scalettar, R. T., Rigol, M., Muramatsu, A., Denteneer, P. J. H., ...
In the absence of a confining potential, the boson Hubbard model in its ground state is known to exhibit a superfluid to Mott insulator quantum phase transition at commensurate fillings and strong...
Mott Domains of Bosons Confined on Optical Lattices (2002)
Batrouni, G. G., Rousseau, V., Scalettar, R. T., Rigol, M., Muramatsu, A., Denteneer, P. J. H., ...
In the absence of a confining potential, the boson Hubbard model in its ground state is known to exhibit a superfluid to Mott insulator quantum phase transition at commensurate fillings and strong...
Troyer Symmetry breaking regime in the nonlinear Hattree equation. Preprint mp-arc (2002)
W. H. Aschbacher, J. Frohlich, G. M. Graf, K. Schnee, M. Troyer
The present paper is concerned with minimizers \Phi of the Hartree energy functional H g [
Topologically protected quantum bits from Josephson junction arrays (2001)
Ioffe, L. B., Feigel'man, M. V., Ioselevich, A., Ivanov, D., Troyer, M., Blatter, G.
All physical implementations of quantum bits (qubits), carrying the information and computation in a putative quantum computer, have to meet the conflicting requirements of environmental decoupling...
Analytical and numerical study of hardcore bosons in two dimensions (2001)
Bernardet, K., Batrouni, G. G., Schmid, G., Troyer, M., Dorneich, A.
We study various properties of bosons in two dimensions interacting only via onsite hardcore repulsion. In particular, we use the lattice spin-wave approximation to calculate the ground state energy,...
Accessing the dynamics of large many-particle systems using Stochastic Series Expansion (2001)
The Stochastic Series Expansion method (SSE) is a Quantum Monte Carlo (QMC) technique working directly in the imaginary time continuum and thus avoiding "Trotter discretization" errors. Using a...
Dorneich, A., Hanke, W., Arrigoni, E., Troyer, M., Zhang, S. C.
We present numerical studies of a quantum ``projected'' SO(5) model which aims at a unifying description of antiferromagnetism and superconductivity in the high-T$_c$ cuprates, while properly taking...
Nature of the quantum phase transitions in the two-dimensional hardcore boson model (2001)
Hebert, F., Batrouni, G. G., Scalettar, R. T., Schmid, G., Troyer, M., Dorneich, A.
We use two Quantum Monte Carlo algorithms to map out the phase diagram of the two-dimensional hardcore boson Hubbard model with near ($V_1$) and next near ($V_2$) neighbor repulsion. At half filling...
Shoucheng Zhang, Horst Rollnik, Dietrich Wolf (editors, A. Dorneich, A. Dorneich, E. Arrigoni, ...
published in NIC Symposium 2001, Proceedings,
A Bosonic Model of Hole Pairs (2000)
Siller, Th., Troyer, M., Rice, T. M., White, S. R.
We numerically investigate a bosonic representation for hole pairs on a two-leg t-J ladder where hard core bosons on a chain represent the hole pairs on the ladder. The interaction between hole pairs...
Melzi, R., Carretta, P., Lascialfari, A., Mambrini, M., Troyer, M., Millet, P., ...
NMR and magnetization measurements in Li$_2$VOSiO$_4$ and Li$_2$VOGeO$_4$ are reported. The analysis of the susceptibility shows that both compounds are two-dimensional $S=1/2$ Heisenberg...
Johnston, D. C., Kremer, R. K., Troyer, M., Wang, X., Klümper, A., Bud'ko, S. L., ...
The magnetic susceptibility chi and specific heat C versus temperature T of the spin-1/2 antiferromagnetic alternating-exchange (J1 and J2) Heisenberg chain are studied for the entire range 0 \leq...
Johnston, D. C., Troyer, M., Miyahara, S., Lidsky, D., Ueda, K., Azuma, M., ...
A comprehensive theoretical and experimental study is presented of the magnetic susceptibility versus temperature \chi(T) of spin S = 1/2 two- and three-leg Heisenberg ladders and ladder oxide...
Honecker, A., Mila, F., Troyer, M.
We study the occurrence of plateaux and jumps in the magnetization curves of a class of frustrated ladders for which the Hamiltonian can be written in terms of the total spin of a rung. We argue on...
Korotin, M. A., Elfimov, I. S., Anisimov, V. I., Troyer, M., Khomskii, D. I.
We have performed ab-initio calculations of exchange couplings in the layered vanadates CaV2O5, MgV2O5, CaV3O7 and CaV4O9. The uniform susceptibility of the Heisenberg model with these exchange...
Elementary excitations of the symmetric spin-orbital model: The XY limit (1998)
Mila, F., Frischmuth, B., Deppeler, A., Troyer, M.
The elementary excitations of the 1D, symmetric, spin-orbital model are investigated by studying two anisotropic versions of the model, the pure XY and the dimerized XXZ case, with analytical and...
Quantum spin chains in a magnetic field (1998)
Kashurnikov, V. A., Prokof'ev, N. V., Svistunov, B. V., Troyer, M.
We demonstrate that the ``worm'' algorithm allows very effective and precise quantum Monte Carlo (QMC) simulations of spin systems in a magnetic field, and its auto-correlation time is rather...
Shibata, N., Ammon, B., Troyer, M., Sigrist, M., Ueda, K.
Thermodynamic properties of the one-dimensional Kondo lattice model at half-filling are studied by the density matrix renormalization group method applied to the quantum transfer matrix. Spin...
Susceptibilities of Sr(Cu_(1-x)Zn_x)_2O_3 Studied by Quantum Monte Carlo Simulation (1997)
Miyazaki, T., Troyer, M., Ogata, M., Ueda, K., Yoshioka, D.
The effects of non-magnetic impurities randomly doped into a two-leg Heisenberg spin ladder are investigated. Using the continuous time quantum Monte Carlo loop algorithm we calculate the uniform and...
Spin Gap and Superconductivity in the One-Dimensional t-J Model with Coulomb Repulsion (1992)
Troyer, M., Tsunetsugu, H., Rice, T. M., Riera, J., Dagotto, E.
The one-dimensional t-J model with density-density repulsive interactions is investigated using exact diagonalization and quantum Monte Carlo methods. A short-range repulsion pushes phase separation...
Unilateral pallidotomy for Parkinson's disease: results after more than 1 year
Schrag, A, Samuel, M, Caputo, E, Scaravilli, T, Troyer, M, Marsden, C, ...
OBJECTIVE—To examine follow up results of unilateral ventral medial pallidotomy in 22 patients with advanced Parkinson's disease more than 1 year after the operation in comparison with their...