MG15 - Talk detail |
Participant |
Wan Mokhtar, Wan Mohamad Husni | |||||||
Institution |
The University of Nottingham - University Park - Nottingham - Nottinghamshire - United Kingdom | |||||||
Session |
EU2B |
Accepted |
Yes |
Order |
13 |
Time |
18:45 | 15' |
Talk |
Oral abstract |
Title |
Radiation From A Receding Mirror: Can An Observer Distinguish Fermions From Bosons? | |||||
Coauthors | Wan Mokhtar, Wan Mohamad Husni; Louko, Jorma | |||||||
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. |
|||||||
Pdf file |
||||||||