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In my notes it is given that using the spherical harmonic (shown below) as basis states in this order, the matrix representing the $x$-component of orbital angular momentum ...
Asked on 06/09/2021
1 answerI am extremely sorry for my silly question but I am really struggling on the nature of measurement... If we have a SG experiment which measure spin of an electron...
Asked on 06/09/2021 by user288166
0 answerHere I am modifying the field theory approach, since I never taken a course on Quantum Field Theory. I am exploring Gauge Invariance in $rm SU(3)$ by the following...
Asked on 06/09/2021
1 answerGiven a partition function $$Z = int mathscr{D}(bar{psi}, psi) , mathrm{exp} left( , - S[bar{psi}, psi] right)$$ with fermionic (Grassmann) fields. I seek to calculate the effective...
Asked on 06/09/2021
1 answerI'm wondering whether or not we can construct quantum deletion error-correcting codes. The quantum deletion error is defined by the partial trace. If we can, could anyone give an example?...
Asked on 06/09/2021 by user225954
2 answer$$v_gequivfrac{partialomega}{partial k}.$$The above equation is for Group velocity of waves, so what is the Physical Interpretation of this Equation? As we know $k$ is...
Asked on 06/09/2021 by Junaid Ihsan
1 answerThere are other questions on this site about the CMB, but none of them answer my question specifically. I am not asking about fluctuations in the CMB. How could...
Asked on 06/09/2021
2 answerFrom what I understand, the light from CMB that we can observe is the result of the last scattering from the big bang which happened 380,000 years prior to the...
Asked on 06/09/2021 by Marko Masnikosa
1 answerLangevin equation of a free Brownian particle has the solution of the form:$$v(t)=v(0)e^{-tgamma}+dfrac{1}{m}int_0^t e^{-gamma(t-tau)}eta(tau)dtau$$ where $langleeta_i(t) eta_j(t')rangle=delta_{ij}delta(t-t')$ and $langleeta(t)rangle=0$. And when we want to calculate...
Asked on 06/09/2021 by GGphys
2 answerWe know that $$boldsymbol{E}=-nabla V-frac{partialboldsymbol{A}}{partial t}$$ $$boldsymbol{B}=nablatimesboldsymbol{A}$$But I see that the following changes do not change these fields:$$boldsymbol{A}toboldsymbol{A}+nabla f$$$$Vto V-frac{partial f}{partial t}$$ My...
Asked on 06/09/2021
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