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Valence bond ground states in isotropic quantum antiferromagnets

- I. Affleck, T. Kennedy, E. Lieb, H. Tasaki
- Physics
- 1 September 1988

Haldane predicted that the isotropic quantum Heisenberg spin chain is in a “massive” phase if the spin is integral. The first rigorous example of an isotropic model in such a phase is presented. The… Expand

Jarzynski Relations for Quantum Systems and Some Applications

- H. Tasaki
- Physics
- 17 September 2000

We derive quantum analogues of Jarzynski's relations, and discuss two applications, namely, a derivation of the law of entropy increase for general compound systems, and a preliminary analysis of… Expand

Steady State Thermodynamics

The present paper reports our attempt to search for a new universal framework in nonequilibrium physics. We propose a thermodynamic formalism that is expected to apply to a large class of… Expand

Hidden symmetry breaking and the Haldane phase inS=1 quantum spin chains

- T. Kennedy, H. Tasaki
- Physics
- 1 July 1992

We study the phase diagram ofS=1 antiferromagnetic chains with particular emphasis on the Haldane phase. The hidden symmetry breaking measured by the string order parameter of den Nijs and Rommelse… Expand

From Quantum Dynamics to the Canonical Distribution: General Picture and a Rigorous Example

- H. Tasaki
- Physics
- 24 July 1997

Derivation of the canonical (or Boltzmann) distribution based only on quantum dynamics is discussed. Consider a closed system which consists of a mutually interacting subsystem and a heat bath, and… Expand

Universal Trade-Off Relation between Power and Efficiency for Heat Engines.

- Naoto Shiraishi, Keiji Saito, H. Tasaki
- MathematicsPhysical review letters
- 2 May 2016

TLDR

REVIEW ARTICLE: The Hubbard model - an introduction and selected rigorous results

- H. Tasaki
- Physics
- 25 May 1998

The Hubbard model is a `highly oversimplified model' for electrons in a solid which interact with each other through extremely short-ranged repulsive (Coulomb) interaction. The Hamiltonian of the… Expand

FROM NAGAOKA'S FERROMAGNETISM TO FLAT-BAND FERROMAGNETISM AND BEYOND : AN INTRODUCTION TO FERROMAGNETISM IN THE HUBBARD MODEL

- H. Tasaki
- Physics
- 18 December 1997

This is a self-contained review about ferromagnetism in the Hubbard model, which should be accessible to readers with various backgrounds who are new to the field.
We describe Nagaoka's… Expand

Ferromagnetism in the Hubbard model

Whether spin-independent Coulomb interaction can be the origin of a realistic ferromagnetism in an itinerant electron system has been an open problem for a long time. Here we study a class of Hubbard… Expand

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