Concepts in Quantum Many-Body Physics

Laurens Vanderstraeten

Piers Coleman

A modern, graduate-level introduction to many-body physics in condensed matter, this textbook explains the tools and concepts needed for a research-level understanding of the correlated behavior of quantum fluids. Starting with an operator-based introduction to the quantum field theory of many-body physics, this textbook presents the Feynman diagram approach, Green's functions and finite-temperature many-body physics before developing the path integral approach to interacting systems. Special chapters are devoted to the concepts of Fermi liquid theory, broken symmetry, conduction in disordered systems, superconductivity and the physics of local-moment metals. A strong emphasis on concepts and numerous exercises make this an invaluable course book for graduate students in condensed matter physics. It will also interest students in nuclear, atomic and particle physics.

Bachtiar Rifai, Dwi Satya Palupi, Muhammad Farchani Rosyid

This paper has studied the correlation of economic systems in the market for goods by using the concept of state and the concept of observable in quantum mechanics.Also proposed the concept of economical mass as an economic actor counterparts concept of inertia or inertia in physics. Studied the things that determine the mass of a principal economic economical. Discussed the possibility of applying the model to market goods with commodities and M N economic actors using the concept of Quantum Many Body Problem. Keywords: Ekonofisika, Applied Physics, Massa economical, Quantum many-body problem

Alexandre M. Zagoskin

M. P. Vaughan

The mind-body problem is reviewed in the context of a non-technical account of quantum information theory. The importance of clearly defining: `what is physical?' is highlighted, since only then can we give meaning to the concept `non-physical'. Physicality is defined in terms of interaction, which is in turn defined to be a correlated exchange of information. This is asserted to be the basis of any meaningful concept of epistemology. Hence, it is argued that a non-physical entity can not `know' anything about the world. Information transfer is then discussed in terms of quantum entanglement and an argument for our perception of time is presented. It is then contended that the notion of `mind' may be meaningfully discussed in the context of a quantum theoretic framework.

Alexandre M. Zagoskin