Bose-einstein Condensation in Nonlinear System

by Sasaki, Shosuke

• ISBN13: 9781616687540
• ISBN10: 1616687541
• Format: Paperback
• Copyright: 2010-10-01
• Publisher: Nova Science Pub Inc

Summary

Bose--Einstein condensation was discovered in atomic gas systems, where Bose condensate occupies 100% of the total system at zero temperature. Liquid helium systems have been investigated based on the Landau theory, where the superfluid component of liquid helium is background flow. According to the Landau theory, it is doubtful that the superfluid component is a Bose condensate. In experiments, the probability of helium atoms with zero momentum is a few percent of the total liquid helium at ultra-low temperatures. However, the superfluid component occupies 100% of the liquid helium at zero temperature, as macroscopic observations indicate. This book introduces a quasi-particle representing an eigenstate of the total Hamiltonian.

Table of Contents

Preface

Introduction

General Form of Total Energy

Temperature Dependence of the Excitation Energy

Calculation of Entropy

Specific Heat

Bose--Einstein Condensate of Dressed Bosons

? Transition & Phase Diagram

Two-Fluid Mechanism Caused by Nonlinear Energy Form

Properties of the Solutions

Contribution of Dressed Bosons in Several Phenomena

Thermodynamic Functions

Discussion & Conclusions

Index

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