621 reputation
413
bio website
location
age
visits member for 3 years
seen Dec 19 '14 at 21:55

I'm an experimental condensed matter physicist, but I'm very curious about high energy physics as well.


Mar
15
awarded  Yearling
Mar
2
awarded  Popular Question
Dec
19
accepted Helicity and Pseudospin in Graphene
Dec
8
awarded  Nice Question
Dec
6
comment Helicity and Pseudospin in Graphene
Thanks for the reply! If we can tweak the basis to make both $K$ and $K'$ fit the definition of the helicity operator, does that mean the concept of helicity/chirality is not so useful when discussing scattering between the two valleys?
Dec
4
awarded  Popular Question
Sep
24
awarded  Autobiographer
Jul
2
awarded  Curious
Jul
2
asked Alignment of Fermi Levels between Metal and Insulator
Jun
5
comment Can the Berry Connection be derived from a metric?
Ok cool thanks. So if that's not true, my question still holds: Does a metric exist such that the Berry Connection is a Levi-Civita connection?
Jun
5
asked Can the Berry Connection be derived from a metric?
Jun
5
accepted What is curved in Berry Curvature?
Jun
5
comment Does electron-electron scattering contribute to resistivity?
So... Have we reached consensus in this debate? Or still in disagreement?
May
23
comment Does electron-electron scattering contribute to resistivity?
Thank you for the detailed response! I'm still somewhat confused. Even in the presence of electron-electron interactions, we have translational invariance, so the total momentum is a good quantum number. How do we reconcile Fermi liquid theory with the requirement that the total momentum of the system is conserved?
May
21
asked Does electron-electron scattering contribute to resistivity?
Apr
29
accepted Phase factor for nearest neighbor hopping in the Haldane Model
Apr
10
accepted Where does the phase difference come from in a Josephson Junction?
Apr
9
comment Where does the phase difference come from in a Josephson Junction?
I am beginning to understand now. So, if we tie both superconductors to a common voltage $V$, there will be no current? And from $\dot{\phi}=2eV/\hbar$, $\phi =2eVt/\hbar+C$. What determines the integration constant?
Apr
7
comment Where does the phase difference come from in a Josephson Junction?
I would have assumed that if we prepared two superconductors in the exact same way at the exact same time (of course, experimentally impossible), they would have the same phase. Or is that wrong? Is there something else that determines the initial phase?
Apr
7
comment Where does the phase difference come from in a Josephson Junction?
Thanks. What I meant to ask was: what determines the phase that the superconductor starts with? Is it completely random? If I take a superconductor, break it into two, will the Josephson current between them be zero at $V=0$ because they have the same phase?