EU2B - Quantum Fields |
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Speaker |
Wan Mokhtar, Wan Mohamad Husni |
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Coauthors |
Wan Mokhtar, Wan Mohamad Husni; Louko, Jorma |
| Talk Title |
Radiation From A Receding Mirror: Can An Observer Distinguish Fermions From Bosons? |
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Abstract |
It is well known that a receding mirror in Minkowski spacetime can model the formation of a black hole, producing similar Hawking-like radiation at late times. We ask what an observer would need to do to discern whether the radiation is fermionic or bosonic. Specialising to massless fields in 1+1 dimensions, we find that an Unruh-DeWitt detector accomplishes this: the late time transition rate of a detector coupled linearly to the scalar density of a spinor field is proportional to the Helmholtz free energy density per mode of a fermionic thermal bath, hence showing a clear sign of Fermi-Dirac statistics, with no counterpart in the response of a detector coupled linearly to a scalar field or its derivative. By contrast, an observer examining just the stress-energy tensor sees no difference between a fermion and a boson, neither at late times nor early. |
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Talk view |
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