8/23/18

Many Body 621

 Spring 2024


                                                                            

 

Piers Coleman   Rutgers University

Images Texts
Exercises
Times of Course
Syllabus outline
Timetable

 



  Phase diagram of Magic Angle
                      Graphene



 

Magic Angle Graphene


Illustrating the Effective Action in Path Integral


 
 

Relationship between Meissner Effect and Phase Rigidity of a Superconductor.


Gap Structure of a d-wave superconductor
115 Superconductor

Phase Diagram of the Kondo Effect

CeCoIn5: a 115 Superconductor

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Instructor: Piers Coleman, Room 268
If you have any questions about this course or the homework, please do not hesitate to contact me via email at : coleman@physics.rutgers.edu

Scope of Course. This course continues from Many Body 620, and will introduce many body physics needed to understand current research activities in quantum condensed matter, including finite temperature methods, response functions,  path integrals, conventional and unconventional superconductivity, strongly correlated electron systems.   I will also review essential material and offer additiional tuition to cater to those who were unable to take 620 last semester.  Please ask Shirley Hinds for a special permission to register. There will be a lot of discussion and interaction. Please register as soon as possible.

Students with disabilities 
 


Introduction to Many-Body Physics

The reference texts will be  

``Introduction to Many-Body Physics'', Piers Coleman, (CUP, Jan 2016). Chapters 12-18.

  ``Quantum Phases of Matter'', Subir Sachdev, (CUP, 2023). Chapters 15-17.

   ``Quantum Field Theory, an Integrated Approach'', Eduardo Fradkin, (PUP, Mar 2021). Chapter 18.









      Here are some additional useful references:

      • Condensed Matter Field Theory by Alexander Altland and Ben Simons.(CUP, 2006)
        An excellent introduction to Field Theory applied in condensed matter physics. 
      • Advanced Solid State Physics by Philip Phillips, second edition (CUP, 2012).
      • Basic Notions in Condensed Matter Physics by P. W. Anderson, Benjamin Cummings 1984. A classic reference. Many of us still turn to this book for inspiration, and philosophy. It also has a fine selection of important reprints at the back.
      • Quantum Field Theory in Condensed Matter Phyiscs,  A. M. Tsvelik, Cambridge University Press, 2nd edition (2003).
      • R. Shankar, Rev Mod Phys 66 129 (1994). An amazingly self-contained review of the renormalization group and functional integral techniques written by one of the best expositors of condensed matter physics.
      • ``Field Theories of Condensed Matter Physics'' by E. Fradkin. (Frontiers in Physics, Addison Wesley). Interesting material on the fractional statistics and the fractional quantum Hall effect.

      Traditional Many Body Theory and Greens Functions
       

      • ``Methods of Quantum Field Theory in Statistical Physics'' by Abrikosov, Gorkov and Dzyalozinskii. (Dover Paperback) - Classic text from the sixties, known usually as AGD.
      • ``A guide to Feynman Diagrams in the Many-Body problem by R. D. Mattuck. A light introduction to the subject. Reprinted by Dover.
      • ``Greens functions for Solid State Physics'' S.Doniach and E. H. Sondheimer. Not as thorough as AGD, but less threatening and somehow more manageable. Frontiers in Physics series no 44.
      • ``Quantum Many Particle Systems'' by J. W. Negele and H. Orland. Alas all the good physics is in the unsolved exercises! However, it is the only one of this set to touch on the subject of functional integrals.


      Further references:

      • The Theory of Quantum Liquids by D. Pines and P. Nozieres. Excellent introduction to Fermi liquid theory that avoids the use of field theory.
      • Statistical Physics, vol II by Lifshitz and Pitaevskii. Pergammon. Marvellous book on applications of many body physics, mainly to condensed matter physics.

      Some Online references (Check it out- this is a great link).

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Exercises 621
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Exercise 1     Solution to Exercise 1

Exercise 2

        
        
   

      

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Times: 12.10 Weds and 2 pm Friday in Serin 287. NOTE: We will start on Fri, Jan 19th. Occasionally, to make up for my travel, we will hold an additional  class at a time to be decided.

Office hour:  Time to be decided.  Tel x 9033.

Assessment:   I anticipate four take home exercises. I want to encourage an interactive class and will take this into account when grading.

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Outline
  Still to be finalized. This is a very approximate outline that we will adjust after discussion at the first class.

  • Heavy Fermion Materials and the Kondo Lattice
  • Anisotropic Superconductivity and High Tc.
  • Twisted Bilayer Graphene
  • Z2 gauge theories and Kitaev Spin Liquids



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         Schedule:  2024 UNDER CONSTRUCTION  Webpage from 2023


Week


Extra class
Possible Time: 3pm Mondays

Weds 12.10-1.30 SRN 287


Friday 2.00-3.20pm SRN 287
Jan 15-19

 17 Jan

No Class



 19 Jan
 
  L1 Introduction to Course

  Notes
  

1 Jan 22-26


  23 Jan

L2 Local Moment Formation:  the Anderson and  Kondo Models.


    L2 Notes

 26 Jan

  L3 Green's functions, scattering, phase shifts and Friedel-Levinson theorem in the Anderson model. Heuristic derivation of the Kondo model.
 
  L3 Notes

2 Jan 29-Feb 2
Jan 29 5pm

Makeup Class

L4 Renormalization Concept and the Schrieffer Wolff Transformation

L4 Notes

   31st January

  L5  Poor Man Scaling in the Kondo Effect.


 
L5 Notes

  2nd Feb

L6 Large N Approximation

 

 L6_Notes

3 Feb 5-9
Feb 5 5pm

Makeup Class

L7 Large N Solution to the Kondo impurity.

L7 Notes

   7 Feb
 
   L8 Large N approach to the Kondo  Lattice


L8 Notes
   9 Feb

   Kondo insulators and Oshikawa's
Theorem.



L9_Notes

4 Feb 12-16


  14 Feb

  No Class
 
 16 Feb
 
No Class

5 Feb 19-23

  21 Feb
No Class

  23 Feb

Retardation and Anisotropic Pairing
The Anderson Morel Solution
 
L10 Notes

6 Feb 26-Mar 1
26 Feb


Anisotropic Pairing I
Mainly d-wave pairing

L11 Notes


 
 28 Feb


Anisotropic Pairing II


L12 Notes
1st March


Superfluid Helium 3


L13 Notes


7. Mar 4 -8

6th March

No Class: March Meeting


8th March

RVB Theory of Superconductivity and Kondo-Stabilized spin liquids

L14 Notes


8. Mar 11-15


Spring Break


Spring Break

9. Mar 18-22

22nd March

Class Cancelled


24th March

Class Cancelled.

10.  Mar 25-29




29th March

Z2 Gauge Theories and Kitaev Spin Liquids

L15 Notes


31 March

Kitaev Spin liquids in 2 and three dimensions. Jordan Wigner Approach

L16 Notes

11. Apr 1-5


April 3rd

Kitaev Model continued

L17 Notes


April 5th

The Toric Code


L18 Notes

12. Apr 8-12
April 8th

The Toric Code

L19 Notes
April 12th
April 14th


13. Apr 15-19

April 19th





14. Apr 22-26




15.  Apr 29-May 3
 










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