Quantum entropy and special relativity
classification
🪐 quant-ph
hep-th
keywords
spinentropyconsidercovariantdensityfreeinvariantlorentz
read the original abstract
We consider a single free spin 1/2 particle. The reduced density matrix for its spin is not covariant under Lorentz transformations. The spin entropy is not a relativistic scalar and has no invariant meaning.
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