Bilkent University     Department of Physics

PHYS 334 - Statistical Physics

Semester:Spring 2023
Instructor: Cemal Yalabik
Office: Room SA-228 Phone 1316
Office Hours: Wednesdays12:30 - 13:20 Room SA-228
All other times (if available -
call 1316 to check)  
Room SA-228
Assistant: Beyza Sütlüoglu
Homework: Policy Assignments
Exams & Grading: "Cheat sheets" will not be allowed during the exams, but you will be provided with sufficient information for solving the problems without memorization.

First Exam (Solutions) % Friday, April 14 8:30 - 10:20
Second Exam (Solutions) % Friday, May 12 15:30 - 17:30
Final Exam (Solutions) % Tuesday, June 13 9:00 - 12:00
Homework/Quiz/Participation %
Course Schedule:
First meeting: Wednesday, Feb. 1, 10:30 - 12:20 in SA-Z04
Wednesdays  10:30-12:20Room SA-Z04
Fridays 15:30 - 16:20Room SA-Z04
Recitation:Fridays  16:30 -  17:20Room SA-Z04

Statistical Mechanics is a well established topic, fundamentals of which date back more than a hundred years. Its applications and methodology have developed considerably during that time. The study of this subjects is useful not only for learning Statistical Physics, but also for techniques and topics (such as density matrices, quantum spin chains, etc.) useful in other areas of Physics. Although there is no shortage of very good textbooks, it is somewhat difficult to access a particular selection of topics through a single textbook, at an appropriate level. There will be only recommended textbooks for this course. The course will loosely follow the sequence in
(Blu) Concepts in Thermal Physics by S.J. Blundell & K.M. Blundell
although some topics will be skipped, and the order of discussion of some topics will be different.
Other recommended textbooks:
(Sch) An Introduction to Thermal Physics D.V. Schroeder
(Bai) Thermal Physics by R. Baierlein
(Kit) Thermal Physics by C. Kittel & H. Kroemer
(Hua) Statistical Mechanics by K. Huang

Lecture notes: Available through the Moodle pages for this course.

Homework for this week: There will be weekly homework assignments in this course.

Problem solving sessions: Occasionally, we will hold problem solving sessions, during the recitation hour. A problem will be asked, and all students will be expected to solve the problem on their own. You can use your textbooks or notes, but may not discuss the problem with your friends. You may discuss it with the instructor. You will have to complete the solution and hand it in during the session, your solution will be graded as a quiz.

You can view your grades through the Stars system.

FZ Policy
In order to get a D grade from this course, a student must show an overall achievement level of %. An important part of this achievement must be accumulated through regular studying, before taking the final exam. The student must demonstrate this by accumulating sufficient pre-final points from the first and second exams such that the overall average will be over % even if the remaining assessment grades (i.e. Homework+Quiz+Final) average to less than or equal to twice this pre-final grade.

Therefore a student cannot get a D grade if the pre-final achivement level is below % from the first and second exams.

This means, a student will receive the FZ grade (and will not be able to take the final exam) if the average is lower than % from the first and second exams! (If the average is %, the student will need to receive from the remaining assesments [Homework+Quiz+Final] to get a D grade.)

Blu-11,13 Basic TD (First Law, Temperature) Blu-13,14 Basic TD (Second Law, Entropy) Sch-1.2 The Ideal Gas Blu-16 TD potentials Transition rates, the master equation
No Wednesday class (Spring Break) Blu-15 Information Blu-4 Ensembles Blu-20 Ensembles - partition function Blu-21 Equipartition, Ideal Gas Blu-21 Photon Gas Exam week
Week Subject Exam 1st Exam Blu-21 Phonons
Friday schedule followed on Wednesday Blu-22 The chemical potential Application: magnetisation Application: magnetisation
Second Exam
2nd Exam Blu-23 Quantum systems - Bosons Blu-29 Quantum systems - Fermions Blu-29 Quantum systems - Fermions

This course was carried partially online due to the earthquake in eastern Turkey. During that time, lecture notes and video recordings of Zoom sessions of classes were made available through the Internet. The links below provide access to that material. (Note that the lecture notes were not prepared with the intension of distribution to students, but as notes for myself for use during the lectures, so they may be of limited utility.)

Lecture notes:

Video recordings of some classes:

Other Relevant links: