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please note that I am a high school student trying to understand the quantum model of the atom; I have only the most basic understanding of quantum mechanics. I am...
Asked on 11/17/2020
3 answerI'm working through SR along with a lecture/class series. Last week, we worked through an elementary proof of length contraction after already deriving that $t = gamma t_0$ with...
Asked on 11/17/2020 by Heatherfield
3 answerLet $mathcal{N} : M_n to M_n$ be a unital quantum channel (hence trace preserving and completely positive). Do we have the inequality $Q^{(1)}(mathcal{N}) leq chi(mathcal{N})$ ? Here ...
Asked on 11/16/2020 by Zouba
0 answerWe know that $sigma_{xy}$ in the integer quantum Hall effect (or quantum anomalous Hall effect) can be calculated by the Berry curvature, but we also know that $sigma_{xy}$...
Asked on 11/16/2020 by fbs147
0 answerAs far as I understand it the Higgs field leads to the creation of rest mass for certain elementary particles but does it explain the phenomenon of resistance to acceleration...
Asked on 11/16/2020 by John Eastmond
1 answerI have a system of $N$ fermions that can occupy $M$ single particle states, and $M$ is much larger than $N$, $M gg N$. Since...
Asked on 11/15/2020
0 answerSuppose we have two-particle states $$ |0rangle^{(j)} = frac{1}{sqrt{2}} big(|+m,-mrangle - |-m,+mrangle big) $$ based on one-particle states in the SU(2) $j$-representation, where I use the notation ...
Asked on 11/15/2020 by TomS
1 answerI'm reading the book Covariant Loop quantum gravity by C.Rovelli where in 3.2 the action of a dirac fermion is presented in the tetrad formalism: $$S= int bar{psi} gamma^{I} Dpsi...
Asked on 11/15/2020 by Pam
2 answerFor a three qubit-chain in a connected state barrier tunneling captured in the Hamiltonian below with J=1, U=3. How do...
Asked on 11/15/2020 by user276420
0 answerI know that in general the following statement is true: $$langlephi|chirangle = langlechi|phirangle^* $$ And for the operator $A$ then the following identity also holds:$$...
Asked on 11/15/2020 by DJA
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