Torque anomaly in quantum field theory
Abstract
The expectation values of energy density and pressure of a quantum field inside a wedgeshaped region appear to violate the expected relationship between torque and total energy as a function of angle. In particular, this is true of the wellknown DeutschCandelas stress tensor for the electromagnetic field, whose definition requires no regularization except possibly at the vertex. Unlike a similar anomaly in the pressure exerted by a reflecting boundary against a perpendicular wall, this problem cannot be dismissed as an artifact of an ad hoc regularization.
 Publication:

Physical Review D
 Pub Date:
 February 2013
 DOI:
 10.1103/PhysRevD.87.047702
 arXiv:
 arXiv:1212.6249
 Bibcode:
 2013PhRvD..87d7702F
 Keywords:

 03.70.+k;
 11.10.z;
 Theory of quantized fields;
 Field theory;
 High Energy Physics  Theory;
 Mathematical Physics;
 Quantum Physics
 EPrint:
 3 pages