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From: anonymous-8.334-student@MIT.EDU
Subject: comments on 8.334
Date: May 4, 2025
For 1a pset #6, are we supposed to assume the effective field is the same for all positions i? Or is it a position-dependent effective field.
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Response:
From: anonymous-8.334-student@MIT.EDU
Subject: comments on 8.334
Date: May 3, 2025
Is the hamiltonian in questions 1 and 2
of problem set #6 supposed to have sums over just neighbors (<i,j>) or sums over all bonds regardless of distance (i<j)?
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Response:
From: anonymous-8.334-student@MIT.EDU
Subject: comments on 8.334
Date: April 24, 2025
The grade for problem set 4 is still not visible. I'm also
wondering when will midterm be graded
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Response:
From: anonymous-8.334-student@MIT.EDU
Subject: comments on 8.334
Date: April 24, 2025
In problem 4 equation
(1) of Pset 5, should the second term be proportional
to K^2? It seems like this would be necessary for the equations to give
hyperbolae in the RG flow diagram, but maybe it's supposed to have a different
behavior.
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Response:
From: anonymous-8.334-student@MIT.EDU
Subject: comments on 8.334
Date: April 23, 2025
Are grades for PSET 4 available on the grades page? The announcement states
that they are published, but I cannot see them.
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Response:
From: anonymous-8.334-student@MIT.EDU
Subject: comments on 8.334
Date: April 16, 2025
For finding the divergence of the correlation length as $T\to 0$, on what
basis did we set the T(\ell^*)\sim 1 in one problem and $K(\ell^*)\sim 0?
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Response: For consistency, it would have indeed been better for me to set T(\ell^*)\to\infty. The point is that this would not have changed the functional form of the dependence on T, but would merely change an overall amplitude for the correlation length. The reluctance to have done stems from noting that the RG equation used is itself a low temperature expansion, and should not be accurate when T becomes of the order of one and larger. Of course, this is also true for the RG relation expressed in terms of K\sim 1/T.
From: anonymous-8.334-student@MIT.EDU
Subject: comments on 8.334
Date: April 15, 2025
Does open book mean we can access the book/lecture notes on our laptop? Or
should we print them out?
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Response:
From: anonymous-8.334-student@MIT.EDU
Subject: comments on 8.334
Date: April 11, 2025
Up to what lecture does the exam cover?
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Response:
From: anonymous-8.334-student@MIT.EDU
Subject: comments on 8.334
Date: March 4, 2025
In pset2 problem 1d), is the factor of e in front of the gradient of phi a
typo?
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Response: Yes, it is. Now crossed out in PS#2.