316 reputation
116
bio website
location Binghamton, NY
age 26
visits member for 2 years, 3 months
seen 5 hours ago

I am a graduate student at Binghamton University in NY. My focus is in theoretical condensed matter physics. Quantum magnetism, phase transitions of dilute gases in optical lattices, and exotic phases of matter are just a few of my interests.


5h
comment Determine the coefficient of static friction of a box
You write the torque as a vector (which it is), but then just write a scalar magnitude, ignoring the fact that the relative angle between r and F matters.
6h
comment How can one reasonably theoretically model polycrystalline materials?
Well, depending on the characteristic length scales of the system, 1000-10000 atoms might be more than enough to ensure that each grain contains "periodic" physics in the bulk. I can't say much about about the edge states though. Additionally, x-ray diffraction on powder samples is an extremely common experiment and I think the results are only marginally affected by the lack of bulk crystal (aka the line-widths increase but not much else).
6h
comment How to obtain band dispersion from a band structure diagram?
Also, I think a better way of asking this so that it is more general would be, "How is the dispersion of an energy band related to the original atomic orbitals and their interactions?" This is more along the lines of garyp's answer, which is deserving of a more general question.
6h
comment How to obtain band dispersion from a band structure diagram?
So from my understanding the dispersion of a band is another way of saying the bandwidth. Follow the band they refer to as the oxygen 2p band and see its maximum and minimum energy, the difference should be less than 3 eV.
7h
revised Is density functional theory a mean-field theory?
fixed grammar
7h
revised Is density functional theory a mean-field theory?
made a few points clearer
7h
answered Is density functional theory a mean-field theory?
Mar
27
revised Time reversal operator in tight-binding model with second quantization form
Fixed a few repeated grammatical errors and rephrased some convoluted statements.
Mar
27
suggested approved edit on Time reversal operator in tight-binding model with second quantization form
Mar
27
answered Time reversal operator in tight-binding model with second quantization form
Mar
27
comment Attraction and repulsion of electron spin ups and electron spin downs
Copper is diamagnetic, but why are you saying the electrons are paired? You seem to be implying that the electrons in copper form Cooper pairs, as in conventional superconductors. While superconductors are diamagnetic as well, there is no reason to believe all diamagnetic materials have Cooper pairing. In fact, copper does NOT become superconducting, nor are electron-electron interactions appreciable enough to introduce exotic behavior. The electronic properties are well described by conventional theories of conduction, such as the Drude model or the band theory of solids.
Mar
26
awarded  Informed
Sep
30
awarded  Explainer
Jan
20
awarded  Popular Question
Dec
11
awarded  Yearling
Aug
7
awarded  Nice Question
Dec
28
awarded  Critic
Dec
28
comment Minimum size of an asteroid to actually impact earth
I understand this, but neglected to mention it to keep the question short. I'm assuming that there are a few ''typical'' compositions of asteroids, and its these most common compositions that I'm interested in.
Dec
28
asked Minimum size of an asteroid to actually impact earth
Dec
26
accepted Bose-Einstein condensation in systems with a degenerate ground state