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How to find the field number operator in terms of the field and conjugate field in a free real scalar klein gordon theory

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1 answer
37 views

Motion of a conducting loop in a time-dependent external magnetic field

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Blocking infrared radiation on glass of with a film

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10 views

Bronwian particle in two heat baths

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1 answer
11 views

Regarding Kirchoff's Loop Law

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6 views

Why can the charge density be expressed as the Bloch wave integral in the Brillouin zone?

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7 views

When $C_v=\partial E/ \partial T$?

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2 answers
57 views

Change of basis, matrix and operators

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2 answers
50 views

Can Coulomb be derived directly from Gauss?

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1 answer
182 views

Third law of thermodynamics conundrum with cyclic machines

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Exact Meaning of Conformal Symmetry

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Potential of spherical shell when a charge is placed inside

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Charge conjugation and Parity for QCD $\theta$ term

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117 views

Schwinger-Keldysh contour and $i\epsilon$ prescription

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