This is a kind of first course in this subject. The content of these notes are mostly inspired from lectures of Prof. Leonard Susskind.

It covers Entropy, Conservation of Information, Temperature, Boltzman Distribution, Ideal gas, Weakly interacting gas, Ising model and Liquid-gas phase transitions.

These notes are consequence of my self study; and are mostly inspired from David Kubiznak lectures on Statistical Physics. These notes also includes Statistical Field Theory, and can be effectively regarded as a book on Advanced Statistical Physics.

Phase Transitions, Ising Model, Order Parameter, Mean Field Theory, Critical Exponents, From Ising to Field Theory, Wilsonian Renormalization, Heisenberg Model: A System with Continuous Symmetry, Vortices, Monte Carlo Methods, Black Hole Thermodynamics.