Speech by Toyosaburo Taniguchi Dr. Kubo, Chairman, Distinguished Guests, and Friends, I am very happy, pleased and honored to be here this evening with so many distinguished guests, friends, and scholars from within this country and from different parts of the world. The Taniguchi Foundation wishes to extend a warm and sincere welcome to the many participants of the Ninth International Symposium on the Theory of Condensed Matter, which se ries was inaugurated eight years ago through the strenuous efforts of Dr. Ryogo Kubo, who is gracing us today with his presence. We are deeply indebted to Dr. Kubo, Dr. Suzuki, and their associates, who havE' spent an enormous amount of time and effort to make this particular symposium possible. We are convinced that the foundation should not be considered as what makes our symposium a success. The success is entirely due, I feel, to the continuous efforts of the Organizing Committee and of all those who have lent their support to this program. In this sense, your words of praise about the symposium, if any, should be directed to all of them. So far, I have met in person a total of 62 participants in this Division from 12 countries: Argentina, Belgium, Canada, Denmark, the Federal Republic of Germany, France, Ireland, Israel, Rumania, Switzerland, the United Kingdom, and the United States of America, with 133 participants from Japan. Those friends I have been privileged to make, I shall always treasure.

Klappentext

This volume is the proceedings of the Ninth Taniguchi Symposium on the Theory of Condensed Matter. It presents the basic ideas of quantum statistical Monte Carlo methods, including generalizations of the standard methods, and discusses the important problem of convergence. In addition, some promising powerful new methods are proposed, for example, a transfer-matrix method. Further contributions describe specific applications to quantum spin and fermion systems at finite temperatures, such as the treatment of randomness and frustration in a triangular antiferromagnet, the investigation of critical properties of spin chains, the study of spin glasses and the simulation of polaron and bipolaron systems. In particular, some new information is given about frustrated quantum spin systems and the dense Kondo problem.

Inhalt
I General Aspects of Quantum Monte Carlo Methods.- General Review of Quantum Statistical Monte Carlo Methods.- Interpolation Between Dimensions.- High-Speed Algorithm for Quantum Monte Carlo Simulation.- Monte Carlo Renormalization Group for Quantum Systems.- Quantum Transfer-Matrix Method and Its Application to Quantum Spin Systems.- II Quantum Spin Systems and Quantum Spin Glasses.- Investigation of One-and Two-Dimensional Quantum Spin Systems by Monte Carlo Simulations.- Critical Properties of the Two-Dimensional Spin-1/2 XY Ferromagnet.- Critical Properties of Spin Chains.- Monte Carlo Simulations of Three-Dimensional Heisenberg and Transverse-Ising Magnets.- Magnetic Properties of Ising-like Heisenberg S=1/2 Antiferromagnets on the Triangular Lattice.- Thermodynamic Properties of the Spin-1/2 Heisenberg Antiferromagnet on the Triangular Lattice.- Randomness and Frustration in Triangular Antiferromagnets.- Two New Methods for Computing Finite Quantum Spin Systems.- Monte Carlo Method for Quantum Spin Systems with Use of the Bloch Coherent State Representation.- Decoupled Cell Monte Carlo Method for Quantum Spin Systems.- Quantum Monte Carlo for Spin Glasses and Related Systems.- Monte Carlo Study of the Sherrington-Kirkpatrick Spin Glass Model in a Transverse Field.- III Fermion Systems and Nuclear Systems.- Computer Simulation of Polaron and Bipolaron Systems.- A Stochastic Algorithm for Many-Fermion Systems.- Simulation of Magnetic Impurities in Metals.- The Spatial Dependence of Spin and Charge Correlations in a One-Dimensional, Single Impurity, Anderson Model.- Quantum Monte Carlo Studies of Nuclear Systems.- Index of Contributors.