Intro to Quantum Condensed Matter Physics

[@georgefan2977]

Thank you for this. I am a first year applied physics student looking to specialise in nano material physics. Just been going through videos to get an idea of what I will be doing in the future.

[@lichifang632]

a largely underrated lecture

[@dariuschong4574]

This is amazing! I'm just a first year physics student but I can't wait to see what's ahead already :)

[@siamsama2581]

You should have finished 3 year by now. How are you holding up? I think you're at a stage to take this lecture series, are you going to do it? I'm gonna go over this lecture series this summer before my 4th year!

[@dariuschong4574]

@@siamsama2581 Too busy for me lol, it's nearing finals in my university right now plus I'm already taking solid state physics this semester (which I bombed in the midterms 🙃). I will take this lecture series right after finals though. I've already secured an internship position which I will start in September and I'm gonna be working on entanglement dynamics in bosonic systems. So, condensed matter physics is gonna be quite important for me.

[@siamsama2581]

@@dariuschong4574 What a coincidence! I am in an internship working on non-equilibrium bosonic systems (so like polaritons basically). I'm specifically looking at the KPZ universality class in these boson systems. Yeah I also did Solid State in my 3rd year. After my internship is done, over the summer I'm gonna go through this lecture series and the book he recommended before 4th yr. For me I want to do a PhD in Condensed Matter so everything Condensed Matter related is important haha

[@siamsama2581]

@@dariuschong4574 Good luck!

[@sayanjitb]

At 22:03 you did mention that the Hamiltonian for many body quantum system can be exactly known unlike "High energy physics", but as far as I know in the DFT calculation there are some systematic "guess" to construct Hamiltonian and so there is no known exact Hamiltonian available. Can you please bring this to the light! And also, in Braiding diagram how could you able to label the electrons in their respective initial and final positions? Thanks

[@sbhhdp]

Wow....this is moksha!

[@AvnishKumar-sg4sj]

Thanks Sir for the wonderful lecture...But @ 52:00, I was unable to comprehend that why for insulators the Fermi level lies inside the bandgap after all it is the highest state that electrons can occupy at 0K?

[@drmitchellsphysicschannel2955]

This is a bit subtle and I did not want to get into details in the introduction lecture! One could define the Fermi level of an isolated system as the highest occupied level at T=0, or the lowest unoccupied level, or somewhere in between. This is a bit of a matter of taste. I am depicting it here just somewhere in the middle of the gap. A better definition though comes from statistical mechanics wherein the Fermi level is controlled by the chemical potential. One imagines that the system is connected to a thermal reservoir or bath, with which it can exchange energy and particles. The thermodynamic properties of the bath determine the chemical potential and hence the Fermi level of the system. This can be at any energy.

[@sayanjitb]

@@drmitchellsphysicschannel2955 I did not understand how does this Fermi level influence the conductivity?

[@Somnath-M]

Thank you for these beautiful lectures... I was going thorough the other videos in this playlist.. those are really wonderfull.. But, suddenly you have made the videos private.. now I can't see the remaining two lectures of Hubbard model and topological insulators etc.. Sir please make them public... And waiting for others videos for the first part of the course..

[@drmitchellsphysicschannel2955]

I will make them live again for a few more days, but then I will put the vidoes up in order as UCD students take the course this semester.

[@Somnath-M]

@@drmitchellsphysicschannel2955 Thank you so much !

[@Petrov3434]

Truly outstanding - pace, content !! PS: How do you write on the white “board”?

[@drmitchellsphysicschannel2955]

Many thanks! I do the lectures on my iPad with the app "Explain Everything" which is very nice for this kind of thing.

[@moirreym8611]

I am an absolute beginner to any and everything physics related. Where do you suggest an absolute beginner start for the world of physics, and from that intro point, what should I study after?

[@drmitchellsphysicschannel2955]

These lectures are for university level physics students, so not complete beginner! But hopefully some parts are still comprehensible. For a complete beginner I would recommend first a more big-picture account, like in the wonderful and inspiring books "six easy pieces" by Feynman and "seven brief lessons" by Rovelli. A more comprehensive standard textbook introduction can be found in "fundamentals of physics" by Halliday, Resnick and Walker.

[@hellogoodbye4894]

Thank You!!!

[@subhamsubba9]

It's clear and amazing. Fascinated to know things beyond just deriving the equations. Can we get the pdfs/ppt of these lectures?

[@physicsouruniverse2798]

effective lectures

[@AriadneG-1954]

Love the content, most of it is great, honestly my only critique is mentioning philosophies of String “Theory®” as though they were axioms of some sort. Otherwise, love it

[@jacobvandijk6525]

As long as we can't handle 'decoherence' quantum computing is a fantasy.

[@drmitchellsphysicschannel2955]

Luckily, you can

[@jacobvandijk6525]

@@drmitchellsphysicschannel2955 kzbin.info/www/bejne/bZnKZpiXfNWdesk

[@aboundlessworker.mazhar]

❤From pakistan