Photon wave function

√ Z d3k e(k, 1)(cˆ(k, 1)e−iωt+ik·r +cˆ†(k, −1)eiωt−ik·r) Fˆ(r, t) = ¯hc (2π)3 e(k, −1)(cˆ(k, −1)e−iωt+ik·r +cˆ†(k, 1)eiωt−ik·r) . (13.5)

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