What is the physical significance of the fact that the chemical potential of the photons in a box of volume V is zero ?
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that there are no bound photon states? – anna v Jan 06 '15 at 17:13
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@annav because they don't interact with each other? – BMS Jan 06 '15 at 17:15
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@BMS yes , photon photon interactions are very improbable and even then are not attractive ( though this last is a supposition on my part) – anna v Jan 06 '15 at 17:20
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Why photons don't interact with each other ? – Roshan Shrestha Jan 06 '15 at 17:34
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In the footnote of Huang's Book, it's being written that the chemical potential is 0 because a photon can disappear into the vacuum. – Roshan Shrestha Jan 06 '15 at 17:51