I've been studying quantum computers and while it's apparent to me how electrons are used as qubits, through their spin number, it's not as clear what makes a photon a viable candidate to be used as a qubit. I understand how entanglement between qubits works, and how quantum gates work (though I...

My mom uses frozen sausages for a soup. She melts frozen sausages by submerging them in water (room temperature I believe). She claims this makes them melt faster. She learned this from some article in a magazine and now swears by it. She is of no scientific background, so no accurate experiments...

I am trying to verify the commutation relation given in Peskin and Schroeder. In particular, I don't know how to go between these two lines: $$[\phi(\textbf{x}), \pi(\textbf{x}')] = \int \frac{d^3p d^3p'}{(2\pi)^6} \frac{-i}{2}\sqrt{\frac{\omega_{p'}}{\omega_p}}\left([a^\dagger_{-p}, a_{p'}] - ...

During particle-antiparticle annihilation, are the photons expelled perfectly perpendicular to the original direction of the particle-antiparticle pair? There is very little information on the web about this topic, though I read a book awhile ago that stated that the photons are emitted from an ...