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Tagged with lorentz-transformation quantum-field-theory
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Why does applying boost to state reduction give an incorrect result?
Suppose we have a state $|\psi \rangle (t)$ in quantum field theory. Till $t=t_0$, the state evolves unitarily using field Hamiltonian $\int d^3x H(x)$. At time $t=t_0$, we perform a measurement and ...
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Equation of Motion after Boost
In paper of analyticity and positivity constraints, they take example of effective field of Goldstone boson in a linear sigma model,
$$\mathcal{L}_{\text{eff}} = (\partial{\pi})^2 + \frac{c_3}{\Lambda^...
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